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 0xdee79b1362caf620f215805a5f871a74d51eb465caebd048b1ac70d3113b65ef. 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/9678e055-0615-4c11-895d-ab634f64051f.json and https://artists.proofprofile.net/proofs/artist/9678e055-0615-4c11-895d-ab634f64051f.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 0x5cd62c1f1640ec54008c3259d4e57f44a4833e103b5fd93dd40f26df08f26941. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ZA0W02300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa037c205551b129bfcb75e5f76afb0148817c7bbe9fa812d07916f733f47c356. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZA0W02400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bff1c45afca357f01769a157dad3b9a2396dd6420d21d1be3b8afefb9545093. 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/ZA0W02400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af0263aaa4d7ab5ea2c3642bc37d0b5eb0d62df0135eb22a857791d265c6929. 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/ZA0W02400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8860401c7ed14f418a3fcee5dc2e927dba04313574b5b58695c66ead6d85519e. 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/ZA0W02400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3910ae484d8fe4bf95ad62b1913b5dcbfbeccc1f49b2308cb5ef1465ab7dc374. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ZA0W02400147.
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 0x51c4781999744339357a43b78d36e1673cbb46cb03fea9ec2ac3ecfde8d64b48. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/ZA0W02400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5129eb23ec060c83b775b3e450aa00b21f88a9f751a85d081bd4f9249eb72cb1. 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/ZA0W02000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c873011c3a9e56b429c267150abcbdcb242d71eb59e45316485bf5322e90635. 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/ZA0W02100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3430aa7c1fe1fc2f82c41550a8f6c282e27847abf38e0a63b0c21b3666757411. 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/ZA0W02400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57537dc267bddc2778d8afadea12243c2f7311f8b893fffd72f64253fee531c8. 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/ZA0W02200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d62766b6b3c07ce4dd1c0aa527944f88f97fff853074045af0721d74b95a06. 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/ZA0W02300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ea140b7259351ca0728e61d7a0b23a1cad8e999fb9d25597d0454c2ef1d6fe. 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/ZA0W02400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5129eb23ec060c83b775b3e450aa00b21f88a9f751a85d081bd4f9249eb72cb1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:00:44Z), 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/ZA0W02000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50f53a828f76d3d653f8c62017dfa3da00d44a60861ce32a5b03ff05e8dd9d1. 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/ZAQ2V2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd86f7f40c73330ae09cb3849cad09d45d2165dedcd22ffa5f4b2ffdd1c8e25. 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/ZA0W02200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5129eb23ec060c83b775b3e450aa00b21f88a9f751a85d081bd4f9249eb72cb1. 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/ZA0W02000001.