1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb61ef3d6db8dcdde8a179bc37d1dac5c54b74cbfa4db373f0978e0521313ec. Chain 2 (Bitcoin): anchored in block 953999 (2026-06-16T20:20:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31854fb1-b298-4b4e-85cc-4ace699bcae4.json and https://artists.proofprofile.net/proofs/artist/31854fb1-b298-4b4e-85cc-4ace699bcae4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113dd26e639c0f1502eb478f10b6a728d3649986fa6b9fc15e8189e65c521f69. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI291901502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9723860f84836edd87422f9791df594c10d5fcc863f6fa95517a99b00acf75. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI291901505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264af6bdfa77e5260b3cb0bca5a6504c7f1c65cd1e7d30d514322b2b97717dbd. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI291901501.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fac347352836323e690c79c09ab75ec4bfa1ec52f7d7b4b309149f7cd285d0. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI291901503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701c657d73ba1404d76690bbe072753b115bd15a8e3ac0f8a5710b3f2ba85d5c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI291901504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd09c43287103e5e2ad3370642d64cad1c50e08f7de984bc74ef31c6aeb5069. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI291901506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a823627fe8cd91dfa66fbb56ff4875688934f638866da445a829b4fe9222d25. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI291901507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524400d1f7d7464abc8d2cde51a1be9f4fa463ae7c7473d3f7ba217093b99e0d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI291901508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1990a8c021ad0735ad88c886705aad3415e38a181c1d25a0779843c4a2606a2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST8K1404900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc26261719cb4b2247bdc189afbbb6907333ce419f40455dab2c211bbdc13d5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST8K1404901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd373faa2f56981327503d5de7df2cf2b76f22376928f25c7cfb7e4a3acaec012. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST8K1404902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f7068be76ea98568aa26a0ce5e1be97e7ef0fe828efd1df3332a6805f71367. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST8K1404903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957badc454a416c72bf4495c38275432ab7d07058fc9407bff0091c18aae5043. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST8K1404905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617efdc80f4ce51ee656dc0c5077026f1ea8a6136779b3fb06cd175d0771eab0. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST8K1404897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb96f7221824b780aa1ba14063ba67268ece9bfc4379310e41f9a719930399b3. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST8K1404898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728ccab481f0e3c12efc52ca592e3784165150123d4faf3651a0ece86835a14e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST8K1404899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e98ced314fab5ba6c729bb7348d8b8c6947fd5689d852a83e0fec0aad17d084. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST8K1404904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7d8595ddead106a0f7db1a223f070e1add9636fff54ec4cb4eae095239ae0b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d550ab711b08092bc1ca5158eb0fe350136280edd92f7f4fc690c4c997db618. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04055c6191d927d19f67105b43218e793adaa5e82eb6a7bbca65cf9305dc86a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50636f084765eac2f517d9b058b028d32b0190670b4c2184390481f33a6b31b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df5cd64c486c31cb41416718a26bbf346be99d67ff25a689a3a5832e0db8077. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795bbca6848143cfc5991d817d553bd81552e6b4719a6d64236fe97a725d5646. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a5fec0158167c3d17e0d6e4ef7361b9e5d1b54f27d0ec7e1e392a9e8b687e3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c2c62d12f3058671be43ee17e29dc73fb07bdbe791ae957ed6a83f4888c0b5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7f1aca8e9e78fb3a7a480f8bc7382887f21defa5a973092675a4cb313c5f29. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc60067264488e1d45b6ffb049d9bbb9f2526527915a9a1a755563d4f368b03. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe562ba2196e556aa0c01e515b32e9d59ad37e360796e4127b9a247a6137d6957. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd087c6e5d8fcf5e199a960b6450cb4260171035295049101fd9691a40cfac713. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdf33e3f67ab9344398c34d790115fda3aa1193672fae27f29f9b23d677ec7b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f6ac66016f7611990b592368a2654cc6f419b0207836ca0c3076dae2af69b9. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141c9f6dd94d15f9d03d950024ba4e9937209f5b0c6ae152ea50fd4bed77af04. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86c1008cdaedaa5c46f3c0eae9315b531eb4248e7e3b298de5a76dd53bc72c5. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7819b775ab27dbabde3142aaa5f3d3949898a87c0cb899c3d88d8cfde47b4d7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1480099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5896f012e9a151e331b20a09408fcb2ae9432cef1bf093bbc29a7138ec4dad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1473996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0e44bf6bd24b939987292fe1602c9e56bcfbaf0c02ad4704e3e6bad1a6431c. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1473999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3bc109dc86d327353b8bbb4e08a720b118205c5a18f604e7418545747f7a9a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1473995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dedd8f7c8200359cbe850ea5e344e7f4371b690eeb7a742946f07842874cd6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMPKX1473997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e22a08394acd16298f9a3ad04cff39f928da8d6a69e642647ec731c60aafc0d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI292201003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda0e31840e921a0e6d7d8074af695ec72e0fad607008c0e4c4673bdfa9ef2a3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI292201004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0019eea5ff25ea50a18b6517f99be535453ec191f4eaddb637be566983249c7. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI292201002.