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 0xd8657465bf59689e7d9d22a0fba86f75ae6915a7feb8ec77b05915e9e5fdfda5. 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/089221d7-5999-4b30-8f03-38f836c2bc81.json and https://artists.proofprofile.net/proofs/artist/089221d7-5999-4b30-8f03-38f836c2bc81.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 0xfb804a442f7ffd8e796a0370685ce0a3a673a1b2d8431884c32a7350daee4e7e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/MXF152000188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547b0fd5066416cc361fc343178e64c435d71affc4d6be57989828b47bab6061. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:56:44Z), 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/MXF152000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c75c12f15267e82fab8f5e18c8db7701a230c5eeb902c11ffa8df0ae582c70. 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/MXF152200317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80feea569c6d215eb4abfdf4f4b2f8c95f59c0a8b9cafda38a1495232cbcf19c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/MXF152200318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45e3a369618a5f54df3797f74b637405ba560d4bacd87870da8e7e2665cf84f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:03:28Z), 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/MXF152503331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611cb4782c48ac245801636811d704db8175058fab1e4185848bbeec8b2f8e94. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/MXF152503338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95baf5e90bfa5c7375125042e99f28809b10ca68a8a651a4aaa23195d4315534. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/MXF152503336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd607248b9da7e634c117d10c3c5f4f021a6a99001c719d12f676da38f6cb4e3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/MXF152503332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea77c4196b6f6b1740d0134cddd3172fb63d12b77c9eafc86a2a1f2f53842c7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXF152503323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5801f41989e9f2c16bff209e874d91a6e922af6cb715f5b9dd7072673a4c8b1e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXF152503322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff1549c331ea2066bddc01c938591efdeb47d33d9e0f49d6b0a0d329e6e9ed3. 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/MXF152503333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d15338c6c3173e83a851b48049fa2f6da34f51933b9a092a1b1dcc7be31c02. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:35:47Z), 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/MXF152503321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cfbb9a18d199a90a3e13fafc9bf81fe3a294172c5eca50db8d1724afbf19ec. 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/MXF152200261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fde5e2c9b9003e03389d782cf6913dccbed60398ed577fea98c69c1ba166fff. 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/MXF152201285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c75c12f15267e82fab8f5e18c8db7701a230c5eeb902c11ffa8df0ae582c70. 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/MXF152200317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc484b57bba328daab41e44d53fbabfecc7c21b4fa5551cea0ec1bc6c81964db. 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/MXF152200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b8bdc4c0172e977b25eae6585ff656162c8b50359f1b0abcc36c71e77372e1. 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/MXF152000046.