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 0x45d8235a3d46772a1d62f4a4600f1182d597bf386d6bf30c92c4f6dffee46a9b. 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/4aec4a51-3fec-4e4b-b10b-57990546cfeb.json and https://artists.proofprofile.net/proofs/artist/4aec4a51-3fec-4e4b-b10b-57990546cfeb.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 0xf56aee8aac270b70d7c53e5b71916e49fbd0206371c301f6f5ca7bb82c4d8284. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZ9JZ1785140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb5d334f1d09c0b0975d0bc4ba3d3fd0bcb409fd459990bbcc2a3518b0a50e6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ9JZ1785143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1360df24ef2b9992b6c61e282396b7cda584f6052a71e42f0c31e640ad1c9609. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPEW2477641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af621acadeb3196b998948ac7b12f5ef2fb8ee6bf78c281ed5569eed3863c64. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPEW2477642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874135e580997310ad91a6782fadedfaf5539b22940737fc8889c54410d659f6. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:39:20Z), 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/QZPEW2477643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91bf83695d355628a50858c76edc1549171c0808ab8f3ffa883e2bba95c25a8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPEW2477644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad57668bd53b5a62b3849b2719ff1abfd511b0738910015cf65bc71dca7cd26f. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-17T08:57:01Z), 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/QZPEW2477645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd561c24ab27afb1140ddcc9adcee5fb21aef914c260fb850f870fae52e97966. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:02:05Z), 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/QZPEW2477646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098272217a440fe0d23e203b54530a49df47422d58ff62babb8b45cd92d4fc5. 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/QZPEW2477647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d3cedf9fd1fac51a859f7080dc859a354cc940abc524b8b5a54f9f6ccafdd0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:23:43Z), 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/QZPEW2477648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fd9a2c34879c71fe7efa52dd232dc9a07d9cbdfead622bb241b791ee27e592. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPEW2477649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2e8db3282a03d864bf9f6c9f56b626a72904e60df80f7930707c9dd803b1ed. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPEW2477650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadb3c1c77009ccf89b0ba346c09579b6b12530ac4ac0ad6a3c2e63395edd0e9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZPEW2477651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa32cec7bf707bc9bd82a0e3119477d7e641c3ec850c9f2c1b658695fcfd04d. 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/QZPEW2477653.