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 0xdf476d09443d7d810900058496e924b11658a17062e88067e9b098292b37a363. 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/4c6eb16b-9b3e-4eb5-9ec2-26fe2c37ef63.json and https://artists.proofprofile.net/proofs/artist/4c6eb16b-9b3e-4eb5-9ec2-26fe2c37ef63.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 0x020bf42e7bdb5c073064afc5bebe6749022f398883c56604c450625e5ab89cf0. 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/NLQ8D2400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf775cc5e5c5fbc8b2979da40a0d1972b98c638bfe87973834a2c6c9d448267ac. 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/CH7812412692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5068cca140f3b62828e83052e83ab08c156875dbe706db2a08979ca78f98ad1. 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/GX3HH2475826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bc8e67b77a45047eb0cba65605ed9b5e4a3fde1f558ef37d14eaff405c2b98. 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/NLQ8D2400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aabc45fb40a1181086347131715cd9642d92d1d7c057c2856827f725136013d. 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/US38Y2406442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff42e1b3468ac58e9fa9fb747d00b0cfd2842ef4f47a4fd583fce2d4c201d79. 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/QM6MZ2446590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568c7177db1d39e60ab943a6910adbfe4426113be8c427ff482b95205c8aeca3. 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/NL9KQ2390226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7a92be5c02776c86b51603f2cb6016cb214318f6fb073539c1230df95627d3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRX202447461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121fe767ed040be668dfbb6552775f58f24adf0ae0e9ab2ac8b69af34e5db0e5. 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/CH7812404124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40769cbe2b08ff987e5d5f831933fd499ad09e0dcfd94e0adac1618d5f0f0b6a. 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/GBKQU2422757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e963c7a912c88648dfb4759aec1afc0f051da15f70915fd31e7228a9d2e1d06. 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/GX8KD2420565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79061b9c64c6ddafa4b685481c5fa693fc97392578ad66f0c9a0e8ea193e622. 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/NLQ8D2400514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5f2bc34590df00d86c24b711a632638606ec65c5b2fba934d835c108b1d7cb. 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/NLQ8D2400505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714e25d3341638e9b5dfc6204ddf9dd9a74c5cb79af8e1cc4615902fc1c439cf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NLQ8D2300739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0c5904386b401ce6428426fb0bd06b5cc04166c9eadc167297b736b3da370b. 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/NLQ8D2300694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2563a05fe258614781339f1de786bd2ddc7faab84d50c9c0a2a6c94160bda2. 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/NLQ8D2300491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43822dbb51dfd8d4e8a0fa314f5edfa00fe6a4339cb97f897e2eece700ea1abb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US38Y2418547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2823e075e552c5583d36d9ed04a55cdd4a00a4bd2830845dabdb8ddf23cd7611. 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/US39N2311777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801e6e431f5edac346c6fc42b4f62548de27ddc420864a99c1566ee0bf9e2d03. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US39N2311778.
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 0xb3e16e7be70f273245dec11e3786680761fbc58e9bdc94cb4fabbcaa87ff8c96. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2372513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf0a126918ad4690e7cb6a8cc814d46cf2ffc9ecbcb5c1b21f60c452477b5d4. 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/GX8LD2285807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563b634ffa9e8f9893a44df1a22ac8f18866d8769cb318f0b4b9bdb56b529fc2. 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/DEUD42221074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18af71caefc7c43a71197a83cfde7e7931c9622fbe807c8376c665ced2a17d5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEUD42221075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9888b6e669367423f312e03bcc96e9f34d418cd8e3b2c8f5783b96a3debe44. 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/US38Y2417864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0763cb53c992eb0b620b87cea94b6b843e52f5198edf8a03d222981cbf590eb7. 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/GX5MY2281240.