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 0xc2dda5d25f787ce50ee36000d7243b0ab91b891625db3ba4db0869397c5cfc6b. 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/e6f80082-3d28-4476-8700-9ba4ca528496.json and https://artists.proofprofile.net/proofs/artist/e6f80082-3d28-4476-8700-9ba4ca528496.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 0xd90f418a4e50c2dddb5d4cb0f029c44a742005a81d2326f0007dd9f01dd8c5bf. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/DEZC62277453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4a92cb6c04900eecc6dabf9910229c9f4e36f75ca2fe342c3c8fe2c1d45a39. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DEZC62280134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1e725c248d9c6bd43ebc8ac7902beb7c167ea72f31c6cca6926392ee04e41b. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/DEZC62284912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183d541fdb02c02711c24ef783f4ff1687bfc96b75dfb578c3e324e389195d64. 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/DEZC62293771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0b3b870882c0f42bff668e9ff8b1b1f2e6dd5f3de3f3587cbf73e3d37b581b. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/DEZC62380870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0b5ebec0090339e72bb557d21456c2de307df05d95c1562366a8767498c343. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/DEZC62380872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a3ece3e0546b6eaa6dff32209c20419fd28544f2fcf755d14c768360000196. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEZC62380873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7723f8417ca7228dddf4aa3d10288a369bb21c5c32bd24d9ccdd2056cd6c0908. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DEZC62380874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be551d16d30d127cf3bf718de05f67907fddf6e07236f9d35e066fc53c1e905. 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/DEZC62380876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6f69b51b6e24e4244a59bf929d3de522af7f45a6c921f7c053ccc703846cd6. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/DEZC62380879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71a5d9bc1415790aaf9ca3547c09b391dfb3358faf210ebfb3f266d3f3c8632. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEZC62380880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3c5a37203818c3c9cd98cec711ab96eba18185e2c33b0e112a06181a947d92. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/DEZC62380881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9641f7e4ab8daf9ee62b2bafd03c3db8bf5cade28be72e8837419d3b02b66b19. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX452505682.