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 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 0xe1fa243e2485875c69fd47fff2689843993d24162297a7a6b003ad70cb63935d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7461dd3f-3b3b-40b2-8249-5ddcec704273.json and https://artists.proofprofile.net/proofs/artist/7461dd3f-3b3b-40b2-8249-5ddcec704273.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 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 0xad44ec66bde7f6a151611e71cee9784995169d06d47c2d45f32227f7230bb40f. 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/PLUM71700975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81e9843079d1ca72f44560fefc0081f6bd58164e87068504f5cc058f1a37c4e. 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/PLUM71701025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3935fb42decb365ef6875a427acadde0558ede6b7a77ee71151cc130d119d0ac. 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/PLUM71701003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf342b77048a406b3ab0f0fff353ed3303cf4d12633139bef8693880119a54d. 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/PLUM71700999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6306beeba8ffc05c2a6b87828b049ce3abdd762342310bf60f03444bdf3d021. 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/PLUM71701026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8103ca2d9366b76fc51abc59df774c00d988939dc3425015f7497f51ee9d67. 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/PLUM71701027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232210bdbfe9a526668a9e38df750411f289daaff0ead096671e7627adb0ae98. 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/PLUM71701028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f62e3b630a1ad39800de700670a3e9013482ae0e6ce6db831e73d40b0062159. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:55:34Z), 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/PLUM71701029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31fa94db19459e6313ef7ada712186ff3ebec294703468cdd721beaf267e915. 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/PLUM71701030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712f9bb2ae53ebc9253eb1fff2b5db32b4765bc24d3ccad77f35f04084834881. 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/PLUM71700998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a618a27c830aa04d2e6a8455fb6fae61ef1e5a450c71475715ccbf4e5a9f0ea. 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/PLUM71701032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa17d2b1313b08f7f0b278351ebf38807788defee6a87442235579f7cfe882b2. 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/PLUM71701035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8024b665b713be733273c9a1aa140511c368c9baa99fe5212c14cfb0d5948158. 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/PLUM71701036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2237a18208db130ef2f13fa34d2f113cb1b96e6fce8e138f52f3356e5579ce40. 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/PLUM71701037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922d55e60908223c0e2cd7c35bd1183746553e34709375cd783f9104cdd4748e. 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/PLUM71701038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee38de67a37bc548e9135135736e82503feb1c888d982101b38cac9d0d29227. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC591900286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa274bb18a35d2d6cdfa617f781f7d3c014578e1d601283430eb9a906907aeec7. 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/PLC591900244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8acc0039f833a60a287dfc39805d857605f72f236c5471b78f88a81e1e7046. 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/PLC591900288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecae3e7fdfd19d1e5989b0779ebcd0b200c91a4395c89f4eb9624ec79912cb3. 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/PLC591900289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036c68454892c1ec408de05506259fe91d7b7e2190042eeb3a079adf0df96582. 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/PLC591900290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a10268c7a706bd6daadf95f55ac648011d7616920a5bd9dbce05eff126f84f0. 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/PLC591900291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c67cbbf4f59825e2246ce51db88efbf0453a0f64c0dc0917f1af4128deab7a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC591900292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bb492547abf577a0e0a05a7ede47ad9270f6a47996716ef43b2c4723a8bac8. 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/PLC591900293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdbb5816abd3327d85ab82c4ee7af37732aa9d2b91b072340f0368dbe843f4b. 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/PLC591900294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37258358d855ccea17ebee719f7c0ce0981cbf874ef55848a9f2baf9efcce6f2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/PLC591900295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c73ad0162ed3a2e99ec9fdc95703884e1ef88a22a31b070a2c1172d42a7622. 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/PLC591900296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87200d133b959ecf6b93b0959b89b8132cf78a28c7f827949e40e79f5339b05a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PL88L2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba63ec45d94a875b2d8f551fdda8c5ff3481a3540aac890df6e4ad28f52bd066. 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/PL88L2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f72f97f65ea3b7ff8a678dd9336d72ff400b3c388b204279c42fb5aa7ae210. 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/PLUM72000468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61738e3530aaec04a1e1ab04b1eeb895380b3a413a24c1839999ece87e484409. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/PLI292000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ead7df35bbd58b3c37bbeae12e59a22e8eae76892dea1be9a8a8aa8ae54fe46. 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/PLC062011377.