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 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 0xb589798887ce1543fc6a7652b1014a15e801cc41c866c59ecf3eb4568a94ae14. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13788507-3f25-41e9-afa1-a8b65c06414e.json and https://artists.proofprofile.net/proofs/artist/13788507-3f25-41e9-afa1-a8b65c06414e.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 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 0x8a1bcddd834689f0d555cbb7b442011472f2718a1ce3c189f8c3df3773fc48e9. Chain 2 (Bitcoin): anchored in block 957728 (2026-07-12T16:20:40Z), 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/US2S71409007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943c3040b1c2bd83ce8d1ea1990e6772af51f5b1617f537d8a8d02fbdd702983. 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/US2S71409008.
Welcome To Zamrock! How Zambia's Liberation Led To a Rock Revolution, Vol. 1 (1972-1977)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ec6edde47bf05080302e507c3c1c75151cb2e5fe1d8a2dd51704bdd75c162d. 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/US2S71747002.
Welcome To Zamrock! How Zambia's Liberation Led To a Rock Revolution, Vol. 2 (1972-1977)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe478084d0385332acbba11bb63f81582d3757c70266e3569ad5e9c2b361a67. 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/US2S71748014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ec171293ca858626433a605a266981821c8d248669d984cde6904c43a378f9. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/US2S71067001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a6bc4c246296c38352ddfafc5d6f3f43482cdb095b51de22a1aef1d3c261e0. 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/US2S71067002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633877de3ecb507251bdfbb3cc5cd5c0528995c9c6e01869bf02c244f8ee0633. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/US2S71067003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c61a65487d90bbad17139321499c411a4817ca393009375ac6544982739542. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US2S71067004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce8d6d44ba2a9894f45ca2d32e2dd9c06d457e38f2cd5e412361c3c6211d5a5. 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/US2S71067005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf98793c3198911f88585f7c45e9c0230e1b2c5fab59febd74c9a105e3a9c5f8. 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/US2S71067006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a816d596e8d4358d51d960d9329c6f09007cf309152bbd76f484ce212b270c1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US2S71067007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36fec634709c78422b7158c5318523132ab0cda97e185d42311b5fccc0b9d38. 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/US2S71067008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608acf7a05414cf1710f5b35b354eed6f0fc56a295a7a655b035090308e05b16. 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/US2S71067009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3d7dd3921a39faf40b94fe034ce59623e30f3c2b3343d9733ce80c9d907f65. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US2S71067010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf716b518f5c6441205ed19eba6d7fd272aebc52ba301ff6c9bdd22ad300fbc79. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/US2S71067011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea7fcba292a5a750b3d2642564a62183ca56d46a1c7177ad283a9c40670beea. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/US2S71067012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b7c4df457ec8186ec22de92efc1eb3e7a1256aa8e1c01263e8bb7d5c17261c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/US2S71067013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7ad0fe14c63cdf64efee73ce53f58125873b1a572335313d5105633b89989d. 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/US2S71067024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb89527fffab7b781a6aa3b73f9e4146d59cc4dbb95e85a0780c629ebaaf27f1. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/US2S71067025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198107954a8df99e26b4e33c0fe38f4b6292e2eb7501a51675cd5415ff0ab3e6. 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/US2S71067027.