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 0xc2fc6c1ef7efa7ae35b93ec06c057828b228de66ef4a31f0dca40289c48cd54c. 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/f712e4e1-2484-406c-b204-39c06994edc9.json and https://artists.proofprofile.net/proofs/artist/f712e4e1-2484-406c-b204-39c06994edc9.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 0xfdd3a53205e3ec3f99c637846ddf628d7ce9e6319cbf841626b8b343d6f3a712. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM6P41875235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67464db401266f0d16a67ae5f0bb054961b1f2d721b1fce1a0365b0b11e12f69. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QM6P41875236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f6cf7ebb70454baed8a943ec8893764ee665e15705271506683271e32991ce. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM6P41875237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27708922007d2e852591e7b6589505ca3bca323888b54c9981fcdceadf9ce822. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6P41875238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff79453704bea9bfcc946bcf5647fc2b837ed85589faff824ea1714033cafaf4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM6P41875239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6438fe2f3b0a76c900a168e973e3945e2e560dbcf1691480bab56b5469b404b3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6P41875240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2096bf3e5af0b40364053b01de2947e03d19d5c299c7695eee93e8e0485755b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM6P41875241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc20fa257292434a6efce90f8ebae5e45afcd47b3608a05a8baf55b9eac70ffe. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QM6P41876137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009162b2c6d8e5a9ee468dd8cff37b9137db06ee2d676d1108aa286c9094c8a3. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QM6P41876138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dacea58db7471a5bf521ff2be5c23fa7b637ca02d5fe6e29dce31ed578137cf. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QM6P41876142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d39e445f397885f6a812e71e47db5a31b29165d54fae116613a9acb5b8ecf7. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QM6P41876143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f558e91772ae5d9bcb68337e1bdabaddc4cde3bfb481a39b84afac5b09f20e. 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/QM6P41876144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8284e4e57a2e8448a66fbc08113dd4aa83fb8065eb906cc9dacce2a58f959b17. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM6P41875262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa44cd16c8f53e8f540d68220f85a816138fa952160e6cc58d5cbd88a6b129ae. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QM6P41875263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf31ee0ab0980fac0ae87be29e3f15f65260d96ca03d3eb0c4e551d21a8f153. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6P41875264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d07f888c9e8c86e65691462a71b3989cd7b440cd4e1e718fdb3f40605fd260a. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QM6P41875266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72115f72dfb0013ecbc06a2803107e2c18bdf7f78cec2854068307d5ce8d2463. 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/QM6P41875267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8075ec4c582c5a842f112107a638afa4807eccc29241eec268c1ff0eb57df3. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QM6P41875270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2f6b2efe01aff0e359d5aee1ac0adf97e57ef64fe1c2e056c2c60dfd48d3af. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR6V81385020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee2304e5389ee871190d36a6e9acac1ce6b35fc4c9bc0fa8c81df13aa8e4921. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR6V81385023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae76a802041bc249ac6b155767f415de653598ced78caa657a11822585e2d7f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR6V81385025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e6d530ee376e8a98885d80de4c548e483f9926ab1dae2351085cabcb9031e9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR6V81385026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fab928309ba060f4a75b4b98e38394ae5c8accb03ef5d06bc985630d506c376. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR2X41810200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebb500d5122fb320848398a680fdcd67b0d522a721d15612c2f8adb316332e3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ESA122472431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966e8304b3c1f8037b03b1f4ae2fb29eea7d979dbf48022ef078e38224f06f93. 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/ESA122472433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190f51f826672db915f471d5a0b33363666d5633de86bf1be888f779e5e2dc4f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ESA122472434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c5df42645415b19334795a78ad4f1d489fa613dee590a7cf7fb09d98c5c703. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ESA122472435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7212cb7cb31e6cc207439aefe82c31462a74cb44dbbaf7eb3490e742ae8320. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/ESA122472436.