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 0xb95bec660efb3632c9d219eaded870061592d56ba9bf1488418c993eac5025d3. 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/05e406ec-cba7-4d44-b91a-6c21601e78f3.json and https://artists.proofprofile.net/proofs/artist/05e406ec-cba7-4d44-b91a-6c21601e78f3.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 0xef7a9fbcc690b981b806272b6c9a453077815eb1b1cf90ff4fa0267684956227. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEO1972211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1009ff89adecf3b0c15c23832468943d14e6876d747ec55fd0e3f0e92604b717. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T05:20:29Z), 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/TCAEO1972256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa255be0f2c93f9c93a7140d774a22b324f4430043e3ba10e20dc6192fac67024. 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/TCAEO1972263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6a1513ffb14541ee69a21e6f12de7f0eadee1e3ed7f6b019b9dc0ae7fc005a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEO1972266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f807411673e9bdcc2e2d543fa6045cfe325e34207c12fddad6a461456de5bcf. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAEO1972268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12383da9000a75723c891a41032b8ea074a73ae63d83d398c202113cad5d2bc. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/TCAEO1972340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e939224ac671d793532586e82a36a3ea699c39510b27588f4f46099f8e86a08. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/TCAEO1972343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b510f6bf3d33013f30d54aec9e95c52e7bb55ec57dd84eab110eda051602335. 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/TCAEO1972351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29cd57cba9ea7c90c31b60038c4d399826a676ec92f6a1adb72cd858a1def66. 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/TCAEO1972366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d2a0a1583fdd187cdc788f1f1ae102634c02fd0a35cd13bc0b205b7c50f7db. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAEO1972368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f61d54cd5ad26b40cd422055a189e3e54f629b00d528ffeb0ccc6438d703e2. 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/TCAEO1972378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eddf21c766ed846a3ff82c8014fd3dd2ef2759ff03267bc4fe1b2c5ca3ca2cf. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/TCAEO1972390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5790e1045744ae9a1e9e3e84fa257328a32dbe691a7d44b7a03210ba811e3c. 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/TCAEO1972392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98cd59dc351cb6c837d4dec1453752ddaa17045d6ad9203a1d0749e18913307. 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/TCAEO1972406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e59762a87c777009883c586ea8dcbb5819f2126bbc928db3a7c87382d2180b4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFM2136680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ec313ab50fe3870bc77b854d1e2fd5f7fae0bb825d5ea0057156ae3e5d1af9. 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/TCAFM2158606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e8bf5d904cceeea555e1992d72b4c49c82ebfab2b64153ac5cff88104ee56d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFN2192656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3813fdb9a63d56e972b28ea037ee452f4fae8c367c4aaa4e246d4f8bbe6cbfc7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAFO2149195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423291821853bd62cc664998728e927bfeb907b59ef34ab33d7052f161fb523c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZ972403616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3e022634c055f87a3832b14e329bc29ffcaa07f3f59ba6e03be0fed1f39f0c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DKD3Z0016960.