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 0xbaf272bf8dd0a271253e528cbe4b581f8a856b3f4c6e41c99712d54fc78d8de9. 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/d601b2a7-8507-49a3-af8e-d555676f10e6.json and https://artists.proofprofile.net/proofs/artist/d601b2a7-8507-49a3-af8e-d555676f10e6.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 0x615b36fdfe00889632aff715b0b37af0da0d126eeb6302692043ba0254936a48. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/NL5WB2200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f91036d155156079f53780fa357d53dc810e547f4f70ece2379ae457e4a72d. 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/NL5WB2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8d628f676a2f19ed52946387cc97af3351f0e9ba381b9efb4215336d7b6817. 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/DEXO42074883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b985dcb52c8d34b2471a89330db3765116daee1292ae7109e95ceb77d093939. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NL5WB2300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95b6be6923dd203e4bf1ccdbad6380b675b32bf75ca925be45391c317606d53. 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/NL5WB2300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e080a070df915268210e264a74e33d13665ff42302852189eed365595b0e09. 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/NL5WB2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7303c6f79317bfa7a7714c5c96b998419c73d4c0d33a1bcc1819fe2b1ff0e270. 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/BEIW12200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb036f8242582bd8206471d26305f15f7b435b1730cd6dc6a3c1e47a49ac081. 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/NL5WB2200055.
Science (feat. Sarah De Warren) - Festival Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824bfa979abf5bd8086febb95bdc690cae588ea3668a1eb5f2f7ea2222f8e5d4. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/NL5WB2200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3da246932edb7d62fcc52018bce0e032c0d4e857802f195028846cb438873f9. 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/NL9KQ2390415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5885460968ee6eb29258f54db7ff178ef951c5c57d9956b3b32b405998bfe37. 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/NL9KQ2390358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86c921f54386215d32528d5a92a47074a0140038d59cc2b09915a0f06f292e8. 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/NL9KQ2390165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe994b2d8c711163c49809a05daee23b5f27bac3a2bc3138349c9c52928bec64f. 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/NL5WB2300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a49048f753cee9f685f65fef43ed983e61a2d226be0b27f15e2a3a09bf7d658. 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/NL5WB2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51dc0f998f594d7bc95775cc1f792c70a84ef937f5e2de8b0ed05a4409c8f3a. 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/NL5WB2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8903cb77aab469022a3dd1692dd53812d0c178240ba365d3fdd650562e7e6846. 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/NL5WB2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f936c1854e79d917e89aa5203512ee8140109838effe7e9a1e54aa3faec9e3. 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/NL5WB2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4690bef9dd368c68d712be8388c5509644a2992eab84cd53e565ff2a7a36f0. 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/NL5NQ2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddb71c0f05710cfd60c98263e0f77cd3df9a28e7c463b2e8e7f68424d8620c7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEUE12187285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7961ea821cddfa36418d68b986edb4f8cb14da6a46abbc65136c6f51b236ad. 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/CYA112000920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146fcc29c5843cb8937f9ab6ad1ba618d5a8b5c455ba562cabb369bbea153f87. 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/DEXO62080154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf697f812bf3dcfba41f164dd6b5e44569439258c61a418141fef3b4c190af49. 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/DEXO22077837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bb939528d75ea256036eb59734444380d378c374a2d403a8f15bd00a53f28b. 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/DEXN82064782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7283a7d400a406a566e43141d3ef4479cb95dc6571aeb450ec9b8972ef1d05. 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/DEXN82064783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3edf4802e65c012470ec13fc230bbdaed917168b249e16f651607187b3fa200. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/DEXN82064604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ca39191376f9a3a10a76e425d8303026cef3ca2b1fa5096bdf13d6464e7fce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEXN82089307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3466bf51e3c1e925b1a9979205efdf3c114194e03ca449bdb245c4ee1c56d2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEXN82064680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0df39a5fde92372d4148c7f70b1cf251c86c9267276013654589a9ad959a5f. 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/DEUD92083333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95056768768558538723cb51fe65d3168e4533bcd0ac4f1807d835020cdb9d98. 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/DEUD92083334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a95aac251557638431ba28089d52484ce7bab4f6ac01715c9decb004b74916. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEXO81906036.