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 0x78fc52befd5af82f1beb210d1e1989f8e86034523e04892cebe81190faf627ce. 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/858b573c-1f97-4ba4-81db-cca5d7828f2c.json and https://artists.proofprofile.net/proofs/artist/858b573c-1f97-4ba4-81db-cca5d7828f2c.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 0xd083eaf1f3449aa37ab0bb358a453c988c918d23acca78f6ce133f98b1db0a87. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/SEWOL0100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e4261fb8c0e21734ef3b069e71ae954ce9710c0342875b4e867f9782216cc7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/SEWOL1400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e87dd4e263a1dd6d00512598f000d0996d6932b6ef5e7a1f12788dc388cf177. 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/SEWOL1400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c744d72f134550f87c19581a633f6b450a5cc22ccc7fe4cbd21af67cebf990b. 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/SEWOL1400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf909d777008631095afba8102d4151e9f381ee27f1f3b947425424b4b8ebdc4a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SEWOL1400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6156e221770ad1e4e2ed569a32c4ccd6800b12e2eeb88ddb6e10370f9360945e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SEWOL1400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bcf314ac3e0069b34497b3dbd1b751228a062de51c6cc2bb095a2f54c19154. 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/SEWOL1400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8de1d4938a1d92d87e751b36aed4d0428205f15eacd7c5d6eb7a9515d2b4a0d. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/SEWOL1400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cfb759feff2b4dcc90edf53f1164ba6c9b94eb4f546b184b2df324570f240d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/SEWOL1600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3636cc1714ecaa5aa4be25290ff18a5f312eb1897ec9c52b891e64e0f72f972c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SEWOL1600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7cbd81a9f2313597438a993fa719926d549ae9e8c0e02a3f29a106a17b666b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEWOL1600104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f5a0171260e15066e6fea05e393238ea00c4e6877a6ac155f59923b4ea5116. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/SEWOL1600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859da4f39bfd7fde9e89d69665849d4cac6251b5e3cd4a8436d95eda14a4b2ea. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SEWOL1600109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7d1363cf25f76f98bf652fc9021475b598dbee05ad25edc785587c8c759f60. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SEWOL1600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330371756040e73a83405e3dfe0c33d5da2a9125bcc1a57b6d4a7a9e1b0425f3. 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/SEWOL1600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97751fe3479ab52da10a9302dd7cf046784e6506523a3826bd80fec7eb2ae52. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/SEWOL1900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914caf7d27beefba4231918e6ce2abbdd0db7a21451841fc26b5b13e0a0b3b49. 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/SEWOL1900205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c29b0dc01c34c542cf99fc68c00354b45f36715943cc52997b7f2c80e2eaaa. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/SEWOL1900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f82fff5254e9121a58831ffc8bb4035faf9bdbb5f6b21d7dc25673e93e9d783. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/SEWOL1900208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fab5d5528357fdb02e508f24166ec1ac7aec5ba6a394a30e4d8df8f320a1e26. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SEWOL1900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b906dba46ea9df58598318fb3dde6a67c1db240cb747f51efcee8b90078de3f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SEWOL1900202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6893f7a12f140d6e091e1a6a7a19fde2be77647630002a09169f6b8ca00a08e0. 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/SEWOL1900204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a05c54c208788f2d6c596f88faa383363c471093c9ba04aa08d6511166df413. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USY252179194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418c1df4f00708b0545ae4e3b3b5d429e47e3650237be0ef84ab6824c5b336c3. 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/USY252179197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2031e2549c3027eae7fd92a68781f66a300213adb64f1759e0c7b3b66e7c35. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SEWOL2200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4dad3846c6e597e7db3653bc574c01e6dff7bfc99876db28e4754579a719cc. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/SEWOL2200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b4d1838e88e316340f9e003a1c1c2748dcb965ab4e5c34fb51524ba9879518. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/SEWOL2200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34896759c262d8c11970bdefa0556613a5eec7a4307b6d07361e644ed3bb00ec. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SEWOL2200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05a3e8e94a538099c3a324a12ad639215dc4b17d28226420809fb93b147db09. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/SEWOL2200305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7621a10552c43910c3ab944af294df5f1e9acc791a09f8cbc9ad6201ac5a1bf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEWOL2200306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe023e01b9dd1ef379a24a914b17252a6571be286884ccd6cba68adcd67dc4f7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SEWOL2200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c0fc2090ba669c36b063411409ce672f2159416a11fa08d8e0ad52dee6cd6b. 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/TCAIO2466447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9b95990c9950bb045f620e1dc06f0e9e429c1cb05991158b308d81078cb7ca. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIO2466455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfe608f989e33f5aad8d844016a9ca7fae0b01a790e63e3be4189258754fa8e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAIO2466599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75740d2b8c4ceffc3f8cb71183d6e33e86918dba90c95a33d6fb002ad1254ee0. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/TCAIP2466716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d55434b0e6aa17afe1d0c8838ded52fa4586157dc67ee349d62a4c6456fff75. 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/DES562310827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e28e62ff92dbbf89f69b32636b60bc88c0efa9ed7027e58b60edda2dae513b2. 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/QZHN92289579.