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 0x2b4b732f2773375059b3bde0ed6966a4d1fb9c2658190f1cef8a131ebbae7ff6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea82f0c2-7a4e-4d72-bac5-4bdc97a40a77.json and https://artists.proofprofile.net/proofs/artist/ea82f0c2-7a4e-4d72-bac5-4bdc97a40a77.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 0x1766866557ce16a279025a5ec947c6e27a9e8fbcab79b81d924b33c0a91a3c43. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMER2327798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9edaca6c304d1fc772a97e83eabb639d9c42d8b8004ce6924bb727273a69068. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM42K2385538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb06aa2f6aa6f2ff07505da0414c595e42d0dbf48418ded53ed874a357f0560e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZS632311505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c587c29906c25e44acf5e82f958ffcef24501c83a28c29615c0ac3ea9957bb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/KSA012315836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d246c9a6da0cfd1b7f8c0eaaf59bd2b06ea8933c5fd6a9d747c965e2523341a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/KSA012315837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0616f12c0d7a7eb494799f4eaa9c2c28a9edd2540df51828dc9f1702d24457f2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KSA012315838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcd9466434de5fcfef1c119819ce7ea62a4b62f34b180f00238f30f89c9e862. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KSA012315839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85efe04c75bf14a67de4f7b075b7f52f3e9b7108752befad3e016743eb8529f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB82441745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c4383a3cbc8e97ad7bc21d038073ea6d28dfa20f4729c80e9be66ae8e3109d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNWU2482393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b28c51df7ed3de2cdca9ba8ceaa85522e8d89fddcd9378017a3e8b20581f68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTBB2360411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2743f64b934ed03fb0138d1a47cf83ce9097cc879bf8949597d5f546144470f2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2381500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd050e47833b42bc8b16d6f3f71dfbfa3b78a1f3ffb3bed38d39e1ef021a0cb80. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN52340340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76e51517935073a098ef3743760907a259f952085e560962d9480f4d098040a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAU2253229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b07588494cb7022f89da232df5960dce8db8980e917c8b80dfecaad82f5eec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAU2241427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ead5ed76fa6f6816942cb50af3d7aca42af47b42dbdcf902aeeaf529291aa0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZMEQ2257836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927e1fc9a0391cb26e0fffc4925693e75cef8706ea832d8748e8818fe63503b1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEP2201642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7669ab6177acfacf9b3a3ea6fad310a0b6fa9b9b523a89b0de6ad9db352c3c5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEM2221367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e0fb94f02407f609a044ddc0bbb2d0b62db375723d9511eb0550f7fbb5f6f7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES62202214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7960733e0b346712343ae5595d6b7f3fd8661f9b2b466152414531762781d51. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM8DG2210984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c87e4930392d45fffad5ec42e627005c5446fac6d65000035f481cc24f6398. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZWFR2437595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59554ce3637a45b599605ccb9ccbbc0db94332fd4b07a3facf0cd080b3b7a235. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWQ2556495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55563858be60dfe087bef739a90741846dd35b0102da741b8c74accaf4a9050. 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/QZNWW2580794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d8b43f1df3975351de0c110a7cf7198eacb81693819edf79da5c91b65ec0ea. 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/QZNWX2529775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf820e93a54ae6e6eb72582bc41f47ca28a4b319db1e03a2b1106fef003d9c7dd. 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/QZNWW2580796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1c8284f1d2ab18ffbf97dd89f9674354e45c4d611989590caa6cfca5acbc35. 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/QZNWW2580798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35adb06b9a931e273eea0054de17a68c5b4843f35788654483c0606ef4cab55. 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/QZNWW2580800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2971aa0d5903aa56c1c517b5a2f380c4ec590db8529de38719509d0a5c6d0a11. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZNWW2580797.
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 0x471b5378215a2fa61ad575852f47eb70223f73aa4ca7c887060819be147136b4. 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/QZNWW2580801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd205a33dd9f635d2a580b27500d8f2a302f8f406803f5b3ebb02cba1f53acd0f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAJK2581625.