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 0x50e2c873b4ecc1e6d5360a5c3b4159cce569b18a803733ef0d49672795348628. 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/33bf434b-7538-4d0c-9867-e3b11025c213.json and https://artists.proofprofile.net/proofs/artist/33bf434b-7538-4d0c-9867-e3b11025c213.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 0x6976e3cc0a151e04a01c67f46b951eb41e80d8ad0c0b935ea8c3c4162c11d82c. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/USP6L1700195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe782f3972ab8e8c38bf24aa6fea9f50634b741fa534ba2cd943111f6f68b7e9e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USP6L2000525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b33716207827f5561d400c8e8ddfcb154479ec60c173b790f9b427207e62767. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USP6L2000529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea14b86757102f62d6f2886c194c03c5315541bcf2b06941fa08a08f17c1ee9d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USP6L2000462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3090fe0e6b38436554b328e5c43b7e0b47495041ed0d925718acdaf2ba641f2. 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/USP6L2000463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d44269881ba7cb8d8d1b9827177706a2bb24617910b7211c7eba923675549cd. 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/USP6L1900444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab401a1033ae4654f11368d8267eb9904bbf68221dbbdf8ff71f156bcfe3a42. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USP6L2000449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eeba6659611ab15f0608e249abf5d72fc832c8eba6eae3f88c032dd9c4288e3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USP6L2000450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5f8d2e178bac850165e6eeffa2a80be3813e7a1365f4777253b941cd0a6dcf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USP6L2000451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a1678324b862ece0e537e0a76f3a211dd4975aa06be5640e86b8ecfb5b8e3c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USP6L2000452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e45f88fcdede00f355c9f00e0d0da04235cff94e2a880ee467d1390671d5918. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/USP6L2000453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a775ce75b12cc98724e1c3a23402bcd8f4db2cdea081ce5bdf6b554c4803836. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USP6L2000454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408811ae43938c000bb48c422a716036191f0cdabde1f10d868271a2962530ff. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USP6L2000455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92f5cb5e1d49f847ba629e58f19ac6d8da43e5d086fa67bc9cbcafcc8c735c8. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/USP6L2000456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa924aadd4a38c5ef6d9c73f206904f5e2f55ebf5b9937b2f7ce3eb5efd65ddf6. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/USP6L2000457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdc2564d5ca110cc5d90f0fd594e7de1f022882587861619ebdf2ddbd9ebb2b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USP6L2000458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0097c50e8f6a3560ac8b1b7e2de6c0459d8626c0482888e30c0982b534604e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USP6L2000460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24abfe42855b5924ebf111b65ec53f2b6c3069060d7b0eb7b48064b142966e6. 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/USP6L2000461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe782f3972ab8e8c38bf24aa6fea9f50634b741fa534ba2cd943111f6f68b7e9e. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/USP6L2000525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbb6a9eba5e581554d097982fa1fa0fd53705b706097863a729f36fe9b08f97. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USP6L2100823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb066a56acab2051dc1af42511e8a16e505cbc846ed3e0a3a061ec5c676af33f8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USP6L2201206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ac42d9e67132db7861122488142214d674f0c115d691cdc09429f169a53557. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USP6L2201292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843090f7dd1735aad9f7e39beface449b8d7f174daedbbdc27ddf5b1087fcd36. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USP6L2201298.
Always Get This Way - Live from BBC Maida Vale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160f4507d3fa4668c7b98d8fbf5162358c66100c9d5206edc755eb8ced058658. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBCAD2301150.
I've Loved You For So Long - Live From BBC Maida Vale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacda8fa4daac14fc365049377ec570dca90e497194cb9e05ce1e1f19763c7aae. 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/GBCAD2301306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98d72431a13edb48618a8d17a4493ff3fbbf61ccc31f39a2826003eec93f5ed. 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/GBKPL1818294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1439f26fc9df02681ec829c1bb3026616c95049ab15ec73f52af280a666622b1. 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/QZ47A2401129.