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 0x36166f590aeda8f0a05190ce81cbcd56a8a60eb7ef1ff8212f9f26b45b36804d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ab3fb59-e8a8-42f7-a844-3aef1b2eb39e.json and https://artists.proofprofile.net/proofs/artist/8ab3fb59-e8a8-42f7-a844-3aef1b2eb39e.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 0x859012b689480f969eed9ecfd1622c9ef0e823f9a9c4751926002a218f6fc37d. 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/GBKQU2451293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f35e7ba2004da865733153cf804deb45faa4c447b6619e64315daa4b718bd18. 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/GBKQU2425123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd1186b4f3a86b1b0ad1571703139d84f17504837f321b9ef52c7ea274ff18d. 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/GBKQU2462342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67776811054d4c7f608f7b70c747051aef22f12368b8393c1c67eebd1b640851. 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/NL3TA2433402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a8d82a523f528cf823f5198b13925768da34ff151a96c0cfc305c66e42928a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBLV62423308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5b0b85e261d2a841e3b5042a57916e536d999670b5f1e7fae30d4967164793. 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/GBLV62408677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf61fa4fde7a069e5a2fd9f0eb24bc9f50d6756b8ba1a7dcb461459be89dd564. 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/GBLV62400954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5ffe8654d18fde873db7e6cfb3212ff7f681c89245d822d8dec2552a770e13. 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/NL4AW2430902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f8aff3d4a5bc747fcf8bd75a01dcc6e2b865b5eddcfa90956f8dfbb38cc675. 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/GBKQU2478815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987a44d8f376e9ce62945a17bbd41f3ba6c7930228474943d39aeb6e55dcbaed. 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/GBKQU2471643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab058491931c9e71919cc59f6c5d7199da3bb4451b5272e3b145e7608c9312c. 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/GBKQU2428339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbcabbfd1f4eb5088277ab86e4de8456e17b32bd3a6dbadf2a8692a7a8801ee. 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/GBKQU2475196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304b4c361e4761efe45a675c1674d18c15e4d5f05a0121a0b3c6c9f19c3ac52b. 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/NLH2L2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933b1709a0a8677db396f7051554515282a0d569ae6cfe270564e1173ee53b8a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2461109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0496b76757497d83bff2d9d8aafccf9a938e035c06c66c1dcabcfba38d23a34. 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/GBKQU2447281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321402cb12623e7f8588cd259e8cca0b63b96f37eb3b8165ee3bdf79d8838f45. 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/GBKQU2472725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8066770dda6414feb7cd0d131d055afdf55945b4e493727e1a798fe8a4662ebf. 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/GBKQU2478820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f73bdee5158442e2bb2d067beda3f237f63d3e830fc15d443b71c2bdc6f406. 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/GBKQU2478809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc81082ea7c8ca6e40329feba0234f1f27d6bbf45fa23092fa9f6dc72c353d96. 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/GBKQU2439240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8a1028342d42551d5404d37fb7daedefa6a6944a4e75663abcfe5e2369d7b0. 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/GBKQU2478838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2737930d33cfae912aced678df391cbdac6959e128b3d8c9526916ca2b71fc12. 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/GBKQU2478834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df20a7ce71cefd54b9b6f3f55841ef071bee3050b87097a0215f4fe2f0fb004. 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/NLE802400365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1112e9e497d2d81eaf60a4158a0a4c5749fd9c8fe6bb4748bafec1814f6313f2. 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/GBKQU2478840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3ef561c12d0cf7307859b61077f98b0ee1073daa5220297a48684aac2147ec. 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/NLFL72100197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cda58a6f230c81ae1e729e227de21e5f45f1d54899f0905b1b2e95bc56b5388. 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/NLFL72100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209662f6b3ed73ab394294a8ba982e05fa6858bf61ed73e79bb8f4f18bef3d8a. 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/NLFL72100205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe401702ec3277affffa89edade7802aae2b2549bcedece1a6253ca32265631. 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/NLFL72100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e3f44c3ad8bd6abaa049a0e9291721c612d0c4870f209bde27cd872202226f. 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/NLFL72100209.