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 0x208d238b074cb16770d4823dff42e606d39de6c97f7f5c5a8ff5307638ddba6f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e8be123-624c-44a7-a759-a003e4aecf09.json and https://artists.proofprofile.net/proofs/artist/9e8be123-624c-44a7-a759-a003e4aecf09.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 0x5ae25595b9e7927e64483865ce5852b5df6bcc9a35af460d5144ec2cdbf1b3de. 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/GBKPL1258070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5af85676548803e56b9e8f651e7865ec7eaa37445ed23f9f356eec9e75d3a4. 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/GBKPL1258071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3b00a8ac6b12aed8ec271566bed4a38740d6b6012a192c24c1315821487e83. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKPL1258076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c5350581a1fafb92bcdbe1f9b93a8bf6bab6d2bd6b3b0f0165184eb1c18cb6. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBKPL1258069.
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 0x0c81c4067fab536440c1d6cfa3628999a3090adbb564abcc81de72f0b80d69a8. 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/GBKPL1258074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dd572a49ab3ad530f6f39b5149f66f3a3bf58059907aa6f4f037e1541303f1. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBKPL1258077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d52c2233aec3badfd65e72e3442fec9fdf7b585a74bbc899d1be96389b0343. 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/GBKPL1257797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c5c0ebee640a4cbe2e9f076512ca5b6ae327cdcd63b2ac710351186673bc9b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKPL1257798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb949c209447b1da415a730df0f6386f2a42fca2ecfe799741238c9bde3e887. 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/GBKPL1257801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e984e773dd8edb6953bcfbcc38a907af70e0d0a651457cafc5b417f5268f953. 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/GBKPL1257802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe037c6a0cba33bee4852ec5613524a326c9c5e6c009d50b57c4f4a242eb1d9e8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBKPL1257804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0128b2ba4e726f3243e2dad224d2cad933bd97fd818eb031a34573a210b39cc. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBKPL1257805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e7c3715201841706df3ec4884a35374557cce1629912185d765defa49114f9. 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/GBKPL1257808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1271cfd7e98fbe11b6c79b76682784ed1abc8c89171c051da3c5700ac8f000ea. 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/GBKPL1257811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8058eb531c74f13d6b9db4fa1b64c23d55a5ddff8d861b9cb3f5b7f87d64ec. 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/GBKPL1257812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff363ef4653180f838ce5a987a9c72b87a170c99b2dd5efd4c1f2a77339163c. 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/GBKPL1257814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66478194d01b670ec8dd404952d3793a4fc0d1a68d83c089334fac1e0b98dc35. 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/GBKPL1257816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72ee2bd17680dfb4d8b1fcd3c3128003966f88a37ebdc3d15ce7fc4f389b083. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKPL1257799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c59294ee19fc778318676f42bf49315e76a8a22c2df04567403921ab925dcf. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBKPL1257800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29006f66a1cdd48d27185e1b893b71d8325c7498dfdb6035bf7e8c1ee84ecb38. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKPL1257803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aac036e74f2562a61b73da8f8f546593c7f60f9dfe2fde976248c859146c6e. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GBKPL1257806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75419d070ccc5ad45c90b643a245d0af2911760e065b8d1bc1bf6002650bb87. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKPL1257807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb080adf55672b318797fa046f2d1a2e527991402dc71822e2322a0eca0ef3c. 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/GBKPL1257809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b165895ba4ae0661c270d01aecefd1619d1a85697601e840d2b66120f7c277. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBKPL1257810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030072422050e6febdab96250d5e1a71efa232d64a74d609cecb48190b660e9d. 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/GBKPL1258149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b67864ec8aeaa86a01e6127b35c51f10a35da0a85ed5f2a9efd0b90e67044c2. 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/GBKPL1258151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4080b4ae737fa444dc812cde6a16287c2162294d61c8f322468b78bcc2aaab23. 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/GBKPL1258152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177022d656ac6c8003281b85bad7567b18f6ea4e62ffad9c407cd9385091c062. 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/GBKPL1258153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236b41db885c7c35848abfa019ab0e55ae89892fb486dea01621f8d4f7584171. 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/GBKPL1258154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4d6159a6249dff3a5085a67bbce48177a3cb5bcf6f6f738df325dab86f3b82. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBKPL1258150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf957d4ae279628a9fabfe51138bd203e1ac2f24ab711b5b711e207d9145a3f0. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBKPL1258155.