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 0xd7a939d13f6cf1f1a2063e4f7f1a4263a9249f471966f1571a03dc6f15ca7516. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7843f5e7-fba1-4549-86bd-a5bb8aeab6fb.json and https://artists.proofprofile.net/proofs/artist/7843f5e7-fba1-4549-86bd-a5bb8aeab6fb.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 0x92985854020d4b5bbac58a9dc7c087ae2f49fba3f86e4577023ce1d8b4ce530b. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QMDA61551919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3ab460b7f90dcfc608d5866db9f92dd2fd6888c4ef969983a71d46cf6f5033. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMDA61551921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb80cd01394a5f28daa8dd073fc6458a2bdbc6a1356bd65412c3e15328af3358. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QMDA61551922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c55981bec38e966dc30139d3f7cad4c049c004bc4e390aec5adf9be7164522. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMDA61551923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa11f95e04f42a7d14f6bde039cfcd41a242bdd9d0d6edc521a807935b097d8. 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/QMDA61551924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf313274c4e2a2e56f8bf82e658f178ef688dc0a66ae19c5e2a098404af9a01b8. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:36Z), 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/QMDA61551926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076a095f05191e0181c36b13aca5eb86ff5363b4592a9aef4c1a6645ec6fbc45. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:00:33Z), 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/QMDA61574587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc42f962fc6a637dfb4e94472467e13288a051be04e401470b251f46908c64cf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPVV2300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd990e3c5b6e5618bf771e80875ebad596295a1625bb5ce4b0fba3533cf4c4ef4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBPVV2300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c968442d209d50ddc474935d5f56f40497c436d2380183a15755302b50e101. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:54:24Z), 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/GBPVV2300384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22159e96935da1367cda828385415b745b6b5107907dc4f48a6b8afca4bd949. 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/GBPVV2300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6c18dfbd886b7ac8a002d6cbcde19859aec45e7599ec86580527f3c9b1b14d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBPVV2300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81709cd8d5090fba8b890d12dd4ba34867b194b02385b27e9b6405e8d5715059. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBPVV2300388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d68c8c062747cd89fa31a5af63938804ee3f16c932596d3d9ffce9a944ad30. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPVV2300389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354791d1d10fe5e0d3536ed2010a5fbadc0511261187361c7ab42ef6d56254a1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBPVV2300390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d0ee11e2d86a5ace15f998c63e5ac36195a40340be134b258418beb90531d8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:39:35Z), 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/GBPVV2300392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cbf287d2a2a68418f3357627ebd2fa211b857284864bc94b2d23a9eee91f78. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBPVV2300393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2847d748ccc371ea3af225cdde67acf7dba0f58018762caa4569a81b10711b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBPVV2300394.