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 0x566a340a0aef9cc6546eb8ebc6905f40fd2a5297a10eb99f39fdd413997558ba. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/803345be-d6b3-48b6-880e-5357440bdf8a.json and https://artists.proofprofile.net/proofs/artist/803345be-d6b3-48b6-880e-5357440bdf8a.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 0x5a04e77879ea9ead4deb2c9311073cadbd43a42ba06d40b05d25fd0550f95cf1. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:50:43Z), 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/DER750614003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f61b24c9e20412efca5b762cd1d253cf76b63b5b94eeba42c14553f0b238197. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DER750614005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544c4355e8b3e948c77359215b8b42ec2f7c20d4f169586567f380df31d45b91. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DER750614010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c52ca2f343897ceffaa3ce661f5905383f9808b1229155bcd759e49b7b6b2ea. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:42:09Z), 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/DER750614011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dbee1c9f951fa1c99b6c4ef23acd2b1f599f60371e84b2388d3bdbaf14f7dc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DER750614012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaaa6fe7aae458e8cfecf29b6d229e41bcf8f2c78f13e75aeb9b751b36e785d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DER750614016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a0e45bd703a9eff748cf35085c4b07d3f99c4b95b269394cb83b26468b8708. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DER750614018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ce3da609b4f2b211c6a8e45bc2406f8948ec7a87aecb8dd378a25904725d0d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DER750614019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ee74f4e8e7d1f1494c362ac6ac8f6b56f01967f6441ff7159015bb44173eb4. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:58:10Z), 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/DER750614006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3112c3eb2b1468323c58681632f261239bbcd65eb494d7da755d7de6a5097a5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DER750614007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae80164ec55f98aa055958caf3148b7ca686223883eb958a42bfc3a12fac2fa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:47Z), 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/DER750614008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f6d36c6c9a0025edb229c91b17755d935fb3657446a96319b9fbe95a3789bd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DER750614009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544c4355e8b3e948c77359215b8b42ec2f7c20d4f169586567f380df31d45b91. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DER750614010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf988fd54cfc6f07915b74329d39facb83fe18d2ecaef91844a6ad1683ca07de. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/DER750614015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaaa6fe7aae458e8cfecf29b6d229e41bcf8f2c78f13e75aeb9b751b36e785d. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/DER750614016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f74ddc69936c39e45d31ad17635592791f9e1de19adcb71e63218c829b5ea06. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/DER750614020.