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 0xde9f080e2e80fdad96c5c8ad4c300ec3a6e35b0f26cc85ec16190d56bf8d45a9. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b5bb268-ec05-476c-aaf0-520a139ec2a8.json and https://artists.proofprofile.net/proofs/artist/7b5bb268-ec05-476c-aaf0-520a139ec2a8.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 0xfe0f72b91c5341e4605823d481751eae41a66066a48a82e79e189a38a6387fef. 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/HRA261780030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e2bbe6dbc89fe6b2e58466141ece4075b30e01564e1a366b73dd05a5a1adc3. 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/HRA261481001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed76fa04e449b3d85642a468ab992aaf228cdefeb745a09477da8c63b258d48. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HRA041477950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769ac5eaadf22a24d493c2ae3060562449865ac94bd16c575de5feb6a5c75b9f. 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/HRA261321809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa400f5bd2d1260e665717655cc398f09d552ff806280251f4b13a5e77ddc08d. 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/HRA262080007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63337659833903b5fee1049c7b53893c5c32f0ec47382f32d64972b53f6aaec6. 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/HRA261580801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0e5a363ab39dd36b9b6b36319c3e3fcba096cc5c142561b4f60a195b8c1db8. 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/HRA261780032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639cbabea928e9be66918bf4095fba6a02dbd13b77544b08774f2b43e5c5d10f. 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/HRA041686072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa167c31f0798f04856bb7e1f28d80c1ef4ea16e778fef98790d44f18e9bbcd. 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/HRA261581201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad3df801862f3acad63fca051276fd4faffdf9bb3dfd4700e0d52366f5608a9. 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/HRB901400929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a2bcf560847aa88b3b6c4b03eb72b774eeabba320a298e0fec1f7fde23c24d. 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/HRB901400931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fa94b85a42e6b30713c67c6dff50ea74f5f49d292bfa2d2f9d567db64b7ab0. 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/HRB901400933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59b88b21357751ad2213c496d5fc388e004ff0c6a99766b7cbada1dac9dd968. 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/HRB901400914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50902a1ef4bb9ef64c93b035644b51a15bd143bffb51d98feefa9903d67da74f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HRA041269678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4df6149c235ca63d42227463ebce132c1466cd3f34c61e7b2d8d2315ef0363. 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/HRA041269675.