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 0xdc680401bc4efea8fa0ac6b7fabb8531cb5634e40deaac3db19531ccb179fc0d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1421c134-0d12-4321-b3e2-621d04bda893.json and https://artists.proofprofile.net/proofs/artist/1421c134-0d12-4321-b3e2-621d04bda893.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 0x2755b2410d15421cddfb41a0aa91d2f3a120c1f14135152ec9043bb6dede5818. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX201752705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfcfdbea5c2bd730adbde9d79aa9e7fc11aa504ebfa93d7952c125cf50d367b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:41:32Z), 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/QZPJ32337330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a5d6c57c0232973cc9348f6e303d4a047501bd91c574e076d470466eca0842. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES72141489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4e74eb9c4b582536884fbcc984049ebb2a5e51ce4f3138c3ae57273c86f5d1. 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/INT102100553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bd5893cb7dd21d3e6fbfdf1b8e754226d45b9a1a5e3dda6e0f38a2e610fa95. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZMEP2130797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc40e0a745642ae81e0c2a8746fa3ce67bb473d64e4926080b65f1026308b14. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMEP2133443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a70cd0afcf53f4c82510b2ca833dc0febd0766ae630ac81a0edb623e5d675f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMEN2194771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ba8e4d52eb5fdb8c829acbccb89da1499cd41dae9449c75f912543f4c8571e. 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/QZMEP2132028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef800074c0a05af1c09f1e1a2a5e68de4909a6fc8df45840b87c4f1e090b06ea. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAJZ2537332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b00435ea4272bb4ba0dfd09f08338dcb777110c33c059e5ed373b039b053245. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZNWW2147905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6906846333355152dc80ae8ab48117418bcf63ea3da932626f24d9bf63512aa. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZPLS2104559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5174860c1e2299307d758617d06230fcb83746cd5bd90b623e4a4cfade401d87. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:43:26Z), 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/QZTAU2139077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e49bd49b7a68c2adff3ebaa4aa3a76014babc95f18bd7a61dcf113bbfda5a0e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:56:53Z), 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/QZES72234928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b22fe55a90c4c789711dec9fc7d99b35e73815e9de92a5b8ff7d3f779089e9. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZK6H2248685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03002562bcc9d331c52999495bc194d5813b81d663b34b2d63928aa6d1d8c4c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAJZ2539130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffe9033d6adee18be09eb4ed1f323864a1e82f7ef814901b34a5b811d4ad0d1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZNWU2298977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80095c392ae23c975af0aa564c7c13fd36d84ea8584e63c2d2cce811bb121af9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAS2348622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac3349e7dfee1b3947ceb85bd0e723d82d1cedff3e6467c6deba80027af96dd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZRP52407528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5804c65997bd6cb36b745f98ff4eb7d9bdb9f40e5157cc57fe7f3cd677366f2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNWY2480702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf091a2d8edffe2e336c82467b5ad875b32ecf7e48ab4c6b97655a83710e816d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPJ32481931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162ec5d0e8beb72ad803553965ddbfcf1939cd3f568eddbb69252efa63aca068. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAKB2511078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004b221458867da7a2f70f936108b78d2c179eb3964a0026598094073dec4861. 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/TCAHB2357080.