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 0x9a6c040e24ecd4a9922f9048c413a833f80cd62647a0f2c7ed112ce74870df1d. 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/449cc235-066a-405b-aac0-50e3c3e3c083.json and https://artists.proofprofile.net/proofs/artist/449cc235-066a-405b-aac0-50e3c3e3c083.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 0x7cdd6b4491edf3b433adf4f6216f771f857c2c495a769e81dbc72ff3c30e0f50. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBKQU2025743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70d0ad7eb81c55791e3123dc7d8f4f5ec52748e531f10656b2b3a10bd9d2e16. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:36Z), 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/GBLV62037359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c6ebdadde02c2098c5cc3ff5bc5877377ece0118986b3a53c6ac1d28447773. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBKQU2128131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48242f79f53dfd993753f56c7eda894baa451b03de75859feded426640354393. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:10Z), 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/USLQ22180415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb52ddf96f4200ecf3079b98cd27ef5dacb548ada94183af79a658353314117c. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/GBKQU2242945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea44f0a49880c575586dc77bfb5617e9a836608b0fdc07f4a1df55c550faf138. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZ5FN2564822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b0f1213b44f9b047aab85947294d581ba513b67025c65fee18465099c6435a. 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/USLQ22180821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3fe43f849d26b2e49709cdc98450508e174f772652bed41fab426dcb8aac9d. 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/USLQ22180822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e5e30d8da0ee6d330f3ad83ac139a2a9b6f187a6ffc022a43ce6539c99ae62. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US83Z2512111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae3c7c224df965a8ed9e1688f06640ed05e4794589a53bafecde5ee8efc03d6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA5KR2543339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cba858d49b74d5892f0097081fe0e43c60b493c63ef6bf04da60ba23a8dcecb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US83Z2484146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba0c78e5e2146909073eaa9d3794ecd95f12c8808a50f0597590a1bce5f9917. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/US83Z2484148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1993a7dfb652d97cf1089551457956e651374d5709508c5f18cfe45d81c599. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CAF5R2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d965ca28ece1771242297aa79c41152654470170eb515d253039e68c403d78. 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/AUXN22427030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3534a23e87aafd0679a3326359c97b297158cfb777bf65e7d05022da1782708b. 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/US83Z2311326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062cb6af07951cd2c549b40b52028c6bef4a3a1576081f534d1f220a88d4534d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2228510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b6d51b4bb24c07ade0fa6e6f4b6d918d2eaac442f65b666cc4d2745e369899. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZ5FN2564807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f0a3e5a118855222c92a8aecf8245e86b8616e87e118a0eb91cfa192556263. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USLQ22180755.
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 0xc0b55b22809d3cda5e86686900e377a31ad480cbcf6078417a4d279f34c9cf94. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US83Z2319456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e76b6b0cc372748f84103d5e121e41dffab01dd391152d5b6750acb4ce27d9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US83Z2125095.