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 0x3556fc1918d92d894e10018bcef1d59a3c53c7da511392c0e1ffa7bbb8f55a78. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3b08d97-8b83-450d-8a96-6ed3c8a26dff.json and https://artists.proofprofile.net/proofs/artist/e3b08d97-8b83-450d-8a96-6ed3c8a26dff.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 0x889b9ccc7ab9430a2f24f777b4be68302ca4b9a06220144fe5d8e60c5d59971d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWW2388977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719f9a97cd171fda8c1cbebb0b857dc03701ce00242bc028deb88fa933fc03fa. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:23:04Z), 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/QZTB92362589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eb9b45291dd4bebca2257c2f7be890e6ad500cc02d5cc07859aea3aed2e5b7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTBE2366074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32acc8bf8ce9b689ae3532fb9b64dfdf003aa565e20f99d7a9472a1c3615e640. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:36:30Z), 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/QZWFQ2334080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b848a3bcfdbfb462df1a71d2dda6edc301694ae2006d5a65cf63f0c67e7030d. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZFZ32403700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7974cfa6866fd21a9f6b01f8be88463805ed37ebee3bfe6c4bde76388d85fb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:47:18Z), 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/QZDA82448197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2c3f3739f7e6207b0dd926f91fd8f02edbcc97e835e3cf2ce346403025e85e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA82448177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3559ee0dee036b7808c6cd9c8006e16053cc8c7b97725c8ca6e842aec53400. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEN2445438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc502a3d1964297242a8397222f7d495c2f1fdef4ce6cd8937dc1918a92678083. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMEN2403163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0adcc73eec6eeedc2045c37d9b04c71439195ac7b065fd722c2fb0e3a684af. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:39:26Z), 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/QZZ7K2492395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4422ea4749a83cdcfe867af38f398c7e7950f150188c49e0e522c5f5bd989ce9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3EX2471556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc08bfcb119cfb8497d74f9311cd2965329822540c4b54abaf8ca0771f6eb61f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:11:38Z), 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/QT3EX2469299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5958ac745d7ff08da9b57215e81e5beda246980e703c83b800a12a6f22f7b0f8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA82580634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f6f02f3200e2947565a2c77e88de080d06bb42008441cd7939b97196fdc4da. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN32550858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a6071a1e63c3a5e9fafcaa0c23751014cc5a3687717ac25b1ce96e0baee2ae. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZK6L2550921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4390886c8d4ce9462c9a29ff123e5ab8d4f2f9975b9dd95efacfbeda3af473e1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFM2544675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b5abae9a9656c9a1885dfc18b5260ad901624d4c8021599b8fa97fa76d3011. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFW2552830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cecd2893f5c4fb4b60789052f416453833bf62788921093d6e1bf60dd99e8e. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWFW2597446.