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 0xbdd0954ef72ba9d9e88fe9f7b8b39e2ff4641069ca380505c84014a14c2badb1. 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/09fdeb34-aa3d-4507-af6c-4e12d55aedd2.json and https://artists.proofprofile.net/proofs/artist/09fdeb34-aa3d-4507-af6c-4e12d55aedd2.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 0xe003365c7b06bdb65f944a0bff74391cf980d25352df190327ee6b933e519201. 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/FIRNB1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85784459e90531110c054baf7ef3228d50fb361cad4b69b9a48cfd6d324417b8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FIRNB1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5cb4cb7d8fcf85fe53fdd36f204830f3c78e333f43bba0707675c4431f7324. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:31:33Z), 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/FI3FC1894801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c70863f80b7245b1a56808af4a7e39f44ffb083151ac830e705395972de1787. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FI3FC2193001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e708a0852f9904b821818fdf3213e9638cb538772f29bdd318b79e465b867df. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/FI3FC2292003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf2dfed96721eff5b5074373a52bf6cd61b4d962f74ddf1662ed10ff02dd8ce. 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/FIH8B2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1c568cdcb65611a71d2ac509c70eeff7898cc262e8c1d360697114f6e58572. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/FI3FC2374301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe133d76c27751c7bd6211eec3eeb6993ae069a3afd8d0104ea820a48c4a6b740. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:48:13Z), 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/FI3FC2374303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6848f0800acd3c78d23657c67950778661752a4b0243eb3d9e8327e6cae47dd. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:41:24Z), 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/FI3FC2480801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00050c1b49701822691d9846048712f7b326f67b25c7944dfe62665e8678ae94. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZK6M2471940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e51a6a5248827f9bcf55fbeb7493802d6b4a44236ecccb1f0217feff7e575e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:22Z), 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/FI3FC2480802.