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 0x3f4b88dc5772ddbe35a9199cdfa1827c295eb9780702e9516e3a1265a68f5352. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92afb057-30f7-42b1-82c5-407108bdd645.json and https://artists.proofprofile.net/proofs/artist/92afb057-30f7-42b1-82c5-407108bdd645.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Black Dyke Mills Band: World Famous Marches by Rimmer, Blankenburg and Hall
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 0x0cd200d0cb497bd048ad8d1831980b7160179c68c448b704536f37fefb0fffe2. 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/GBLWD0310501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94e9dab98028d83fd81eb39f9a3bb1f1adcb15163a0899ae149531646a10629. 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/GBLWD0310507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a747eb39598382330a5674205f29a38ac68ceb4de9e735d9f8afdd47c56108. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:21:15Z), 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/GBLWD0310517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cd19c9df397fc6e4fb0a0ff4fa30cd16f6267acd8b7c087cc4118c0c6e67b2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLWD0310518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a65bb6373b38c949f6c8cbf4335977a3c3761a9ac9ffa99a7fe3de18e764646. 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/NOCJB1401204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce03a50cc0b3694f4ee732752458c3a0244a511270198f1f068b3489abbb915. 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/NOCJB1401206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bedd55a52e569698d9e362b08c6935fe34278a9474f89bd242da9a5b787c9ab. 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/NOCJB1401208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512ff37b607d33cd2bb8e93d27b7103cb3319d3aa77b445318baf859f40ce9cb. 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/NOYCH9401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd118bcbd51ed5f4635aaf143d7f1d5824f04c43dced856eccbb8530869bacf3d. 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/NOYCH9401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462a2cd89b5a05ad923f2537e990bcfa9b4d133bf825a3a6cc69e58c67596366. 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/NOYCH9401110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9636d3a1c244b00e5988c603fa6a6c3c27bbe26db49d2b0ce06c783b6639673f. 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/NOYCH9401120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd200d0cb497bd048ad8d1831980b7160179c68c448b704536f37fefb0fffe2. 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/GBLWD0310501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94e9dab98028d83fd81eb39f9a3bb1f1adcb15163a0899ae149531646a10629. 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/GBLWD0310507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cd19c9df397fc6e4fb0a0ff4fa30cd16f6267acd8b7c087cc4118c0c6e67b2. 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/GBLWD0310518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c927fd71a2b50aa9ca38490b42e705490d902a30459587752462e282e2ba132. 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/GBLWD0310519.