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 0x8ac0a19d5602e12bb4c57378cceb8693081420ddb3681667889b276dc6850c97. 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/4ed932da-46af-43c1-ab40-1d9f1c2a8718.json and https://artists.proofprofile.net/proofs/artist/4ed932da-46af-43c1-ab40-1d9f1c2a8718.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 0x9b518cb7b6a1c1c4dc9707c5add1926c856d297054d57715aaa71290a90c8a85. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZES51806200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf80bbbfc825a095e4625ce6880e3bceefdc2b025b8118df13617b7f213680f6. 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/USSD12000396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c2d34b1a7dd2d478e6ed6ba48b9db085de528c49d7967705bcdb0dd1d88838. 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/USSD12100146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eacd2300626fc5187d371efb6f2d9194e28826b922998bfaf4e8a4269db38e2. 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/USSD12100613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a10d70cf544ff109b16cea79c60d2da7ad3ef0cc46ed85a83834ad4746b289. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USSD12100612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d06529979d03928d81c47b57fe2a5fa40b2d2c1a23ea7626e71a06056b0b942. 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/USSD12100611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57039d501d55af0396d9e8800fae25d6611521046ce7d1abbbeb5d2f71d77642. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:41:22Z), 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/USSD12100609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf3402d9884170a5b6c761b980eb912c7a0a5d665c5c339eda4137701ec12ec. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ8J2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01142ef214037ac8139d5ae34d4f60798493f88588a9df07db0765c4ea94276. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ8J2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ab4b446733199cc57c2566a6b5c2bacc8a959b0d5a453b00ec040c2b1feb00. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USSD12300182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bae2a28888523a531c4188ceb8fd1c373c0ec0c4a6408c0a92edaa06b82253e. 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/QZZ8J2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaffdf9ec0564fb507130673c377c0d323dbb09da992fb333fa143d6b3f760f. 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/QZZ8J2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75903e9f3d95a13af3d76bdda5da38f6306621a34d82dfafb95ed1478829f153. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ8J2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5a108c5be0a5b155c6897bc056891a9929bbfe782816203b59fae6e1f307ff. 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/FR96X1938397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e2f586d5e4f45ca612a5a0ce447f997057d6a9dc67836d39388e0b22bdba46. 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/QZNJX2162707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e6fe3dc7d4d114e92d01b5b144ec035d28e576b3c906e93c1d99c45db448a1. 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/CA5KR2264867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e2f586d5e4f45ca612a5a0ce447f997057d6a9dc67836d39388e0b22bdba46. 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/QZNJX2162707.