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 0x016e88d6103f115b6fe8a5df8ce8819c2c67afc1454b02e13b836f9621ded180. 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/851bf1e4-eff1-4500-a4c6-5904f035d7ed.json and https://artists.proofprofile.net/proofs/artist/851bf1e4-eff1-4500-a4c6-5904f035d7ed.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 0x715a622ae05fb5045920b0ba265f91241c8048a6802630a85787becd8125dd7d. 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/DEG931791817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b75c0651b73ac38b99c8110acabe0b4070ca5d5f35bd554e6a2407d8b711afe. 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/DEG931791818.
Papas Groove (doP & Masomenos Remix) - mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd451ac4a82254057044cf545540a09708b8b3e475edef7212096d1509083fc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEG931791819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26370d1b2d3d1f7a51aba17afa4cfac48f9d6072d3de476d26152629e11899ef. 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/DEG931791820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a57c7e517d94771b674a9fe21834e017d89899449111dcee6bd167fa0182c9. 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/DEG931791821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9d2a58ba1fcb9c7757fe9c209fa441178eeaf0dd7fa84c3e6a79a77661a01f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEG931791822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f96e78fce04cc8d30446b98fabd60cec4b2c5a7064fb3ea2405a5a3dd4d3bf. 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/DEG931791823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1b399d6d5a37f5ca0b7232f99e0626b072942061173262363d29fa0bffd395. 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/DEG931791824.
The Drift (Prins Thomas Diskomiks) - mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb84b677205b086a42de7e1f173f7bce5c07a09925ba2d83a7056c5cb02edc07. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEG931791825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f4943eefa8b1abc38f9c8e875a66306af98fa7b2a6d408a2451e5d50571e7f. 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/DEG931791826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023b431efe346282bf7c335c632fb842532ffdab9298665836ddcf8baab72acf. 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/DEG931791827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad15b4df4667e1dfa66b72df1bc93ba6fb3a740ecdaa6e98b0260de4ab36ccd9. 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/DEG931791828.
Hot On The Heels Of Love (Ratcliffe Remix) - mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7cb07800377a803907ff462ee3c170980157f9451b892fd609770e6e5cb639. 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/DEG931791829.
Consequences Of Love (Chris & Cosey Remix) - mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2c5672d749a07fc6864e85e63c42c86e306e95fb1e3ceb06b728b5f19a474b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEG931791830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a2bdc5e0ff142bcc17b1fc8a5efa6b00fa123123e44286d2665f92379b36f6. 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/DEG931791831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc602572542651eec5628511f5cb8dcd09a9f306944a920b3cdba4b7b73122d11. 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/DEG931791832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd255b734e0a0dd7eef1c35c9e2af6191eebdf895056d3d3e30a14869d3fc190f. 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/DEU670400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce3f1e0aef4531c20a595fa34015a4da38e145dd032a7016a04e7941c03e558. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEU671700142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3c3e0746ff4a1c63afe2515252f1d876160783259044bcfc2107818e8e93c6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEU672101556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6b5b5a2fc549af4dca67abf2b10db4551ec9e8ec39cebfb4e185b96e421dc5. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/DEU672000191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfb7d75d407f1fec5c43bdcb96ae3be4efb96cedfbf4ae4dc86815000b8c7e2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEU672101192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045ad1b1804e371ca6d88e60210e2deb6c0a8e589064e98f1fec84465dbec257. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEU672002178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bde72fa0dd27a38133398fa0d93a3bcb99439070ed7eeccacf891ef03528ce1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEU671900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3db348104e2d88808ea3732d2a4fa57552c7510cb98b63527affa6c11089bab. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEU672300863.
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 0xdd5c495b459ed442d1aebd15c7c890d08acf51beb7b994e9955a9081cdb0b69f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEU672001469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a819ea4db6cdcc5d847ed1833aa76ea613f88ca1d35ec7a6aca8b4e60603fc. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEU672300415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd7f426be47eb3c03c0da12bc959844f745b502523a2a3421d718241f9fc2af. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEU672001480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c33d1d408399127a078dbc2c1cb17dae86851552cdaab5eac609f5337636f82. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEU672200645.