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 0x71c1fe6355ae40083aff9e6957d615ceff15e51ed4245eb359d384805aeb34ff. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84251fe8-404e-4727-8bf8-ef1129d604d7.json and https://artists.proofprofile.net/proofs/artist/84251fe8-404e-4727-8bf8-ef1129d604d7.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 0x6a4a8df9e8af2429dd09fc8ae5aa8a1c44ac6f234797189b180b4893535f8f0e. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/ATAI71700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef543e9e535bd08ae4c1cb2bd71936532cc9643e81f77ae62c3ce835c111bd7. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ATAI71600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082c924c758751a7572ed07be8b382e966f353f22993691bd4b9d14688794d14. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ATAI71700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b34b8391eb74111916ea0bc127a6ebe67cfe3f6ca30c7533c7f7ad59a6269ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ATAI71700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3b2cd6463ec8eb3ba1a55c342e0e490d5843e88c7387e73c1ae04fc8e4343b. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ATAI71800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3706b59766240191a4ec5c5de984bdc9e90fa3966718f06d16eea2b1143b64b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ATAI71800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8456d0b21c38dbed1f47d733738e09b179e0ed7a42ba5dafbcacb15b40dc3c07. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/ATAI71800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1e3f97d2b23fdb2859b0ec5267a359dca6c1c2979a74b9ee2dc3d20031aa5e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ATAI71800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c23beae3685adf16cbe822d12b8ca1fb7a3aeebb03d3559bfb2e3e1ebaffb1. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ATAI71900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756b9a85305caa8360b01d01a573098d771089f8c3f167a233cc63efd70755bb. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/ATAI71900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700fc2f68d4f4d0bda7b6899e1a95fd053259d1067bab0e4053aab8646655527. 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/ATAI72000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa845368390165c46523d3d577e049fb1b2fca1214d821fb8544a3e08d0104f62. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ATAI72000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef8f3bdd766e97b00e9f5c57d03ed26afb2a7d257bb94c9d24d002708d70f61. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ATAI72100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd38c7b605a7b35409b47e17a79b37c6914ce7d0e268ed612713c69383739476. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ATAI72100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca27152c157b47f7c0ff01d9fb7d7e0e959a64cee9f605dcc494d0bb17cffee. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/ATAI72100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81f02d4abdb369c81c352bddd24fbfe7d1cd1e80477f5ccf978b3ade998ca99. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ATAI72100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81f02d4abdb369c81c352bddd24fbfe7d1cd1e80477f5ccf978b3ade998ca99. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ATAI72100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd38c7b605a7b35409b47e17a79b37c6914ce7d0e268ed612713c69383739476. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATAI72100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca27152c157b47f7c0ff01d9fb7d7e0e959a64cee9f605dcc494d0bb17cffee. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/ATAI72100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8156de69c4988f4c26c13e78388949bff9361a757299dc5f3c6bfbb9a8db810c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ATAI72200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8536cca2552151f1bb402c5fc772253583be5eaa4a220609d1bf00d6bf3dc5. 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/ATAI72300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d97226d8d620bcb46af9c721afb38cb1ad1c67f31688a6ba439f0b87c3092bb. 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/ATAI72400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e3829b2b265ab7e2e137ff929c2d121c550f441a3d37aceec9a4c759232bec. 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/ATAI72400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75592d3f1521e80283f91da1b50d08b05a8172c70b6e16148743e93ac2742b9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ATAI72500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5084ee9fe5d2e053f763a9a076807b5fab56fed219201aba2efc5c22cb40d10. 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/ATAI72500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89b9ad8aa520c89b0bc67446cdb2630eae1054c550bbd84a55f99a7fee28598. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ATAI72500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3722d604496aa2051d4115dec8c7502713ecd11230b8924d0f542f29ae8ab2db. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/ATAI72500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5651123a21be7d1e273e4bbcb226eeeaf2e9a529a32704c6b9f9396e1c3ac4ea. 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/ATAI72500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ddb84dd34127e760ac139f0b4c0867c772fe0cb325294466107782723155d0. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ATAI72500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55335c9a083d9d22a5d6647e50489f52f09220761448a8ac66528342774a6685. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/ATAI72500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe02358166c9e17551590dd9b1cdbcd3a8748bd31503bc1a8426a1b468a70e7. 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/ATAI72500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd712af7b73494c2e74ed7bb60d3b97ff53f447126244f5fa3c1259ee72c3e3. 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/ATI212001105.