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 0x9a20cab00e061b5efb9b3731128a8ac6771db2e1feba4ec8196f25915267e951. 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/05b437d4-2244-4d09-8297-c1772a3bb886.json and https://artists.proofprofile.net/proofs/artist/05b437d4-2244-4d09-8297-c1772a3bb886.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 0x31b11ba891ebd3a63d342bbd79ee8b6cf7cf29a619454188b2e65e621cba5620. 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/NLHR51625473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94027969076f8f9ba51c060af88fe11c412bb7c66e206a182547c4b81e0f98. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLU7E2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea5cb0ae6c11f44bb0cbd38bcd12ef54e1f61501a6192c3cc4ab4b53f0331b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLU7E2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd67126d6a1adec4fc9bed9bf4c4290f4619e0860e8656b44b2b328998a6b5e. 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/NLU7E2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd527bff46d3305ace1841a32e948dec0ac85a81095b1dd26a8b57127833585c9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLU7E2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74787c2b71c418f531ca78449f73af57673d1ad305a6945a62da26e58687d33d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLU7E2300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7033736b161eb7dd09dac6ec78f5d23b9155bff6b7255d6c617f4aeb7609d2. 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/NL2QQ2000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3394670a4b423357994436dafec8e9f2a97fd630ced56a3f3d8b2521cb3fd0a3. 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/NL2QQ2000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670cc8483907c826c553537d22cdcbced0aad3393d4bb3e54a15e773929aa61a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL2QQ2000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275613c8ed2cf28c3cb0796b9a6002574ac4be3a236b0e2cb98ca6d9f4c22d19. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL2QQ2000085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d909e5d549e7586623402c065bd60c5bf16ddc6f2071a968a1de6f1974a0cb5. 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/NL2QQ2000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d06415b6b5f688e5ae5885c13cf3cdf8a4113ef79e5226606b29ac1e53f9b9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NL2QQ2000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d5126677e28dfa7170be8066a1b4cebd74d2d423f977992d8761c29f285832. 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/NL2QQ2000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbf6c4b9ab78716876e27c962ad7a116ceba7d4e878b319fa369c14876acba6. 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/NLU7E2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5948db3e64221f81dedf2773ebdaa4b8d3c6c99072dd57a49a1ebfb1d235ab4. 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/NLU7E2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2d876caf9e0e3c8400a476b58c49bf81bd681743050cc66c270db1c1a89938. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLU7E2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e02d0b57665fb1f77d6d4f7b90a5979c33bf66d6660b2f578802e00c3a23e61. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLU7E2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbf6c4b9ab78716876e27c962ad7a116ceba7d4e878b319fa369c14876acba6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLU7E2200008.