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 0xe1a3e771355b31c9d3e13195360c7caff42a2f018ae9295622d13d7ca252ddf4. 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/e8b6e082-000d-426a-aa0c-1b6cefa42aea.json and https://artists.proofprofile.net/proofs/artist/e8b6e082-000d-426a-aa0c-1b6cefa42aea.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 0xca809b26e9ada33b191c2ef6636f5903cc23c8abc00d807d4a01a7432cad542b. 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/ESA011584312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8014af0cce00ae6763c326ce10c6efc7bcddf3242297f9d40f57506c669c7464. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:34:11Z), 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/ESA011584321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60ce60f08a00a7b42d6c90526ee6fc868691adac81315a6192324effb746ba0. 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/CA5KR2255142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8467ea1b62d5204246de4c685941f20b88e9eb616e4f06e25c7e86853adffdb1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CA5KR2315394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b98f17279919de5060f3d42f3e502a2397f169ad4decb651bca00301d4f72d5. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:01:16Z), 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/QZGLS2072800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5175bca4c6075639e7593473ea54c4af426ef57416df9999394472293849a82. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2335585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752430a0622e3f6891e035598a9d0b3f3ad55db5e011647b1175ed4e44c55147. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZTBD2370219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefdb6651a004e3794404546eb5675ee8181d68db6f4a090fd776ae23db68c39. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CA5KR2429255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6068dbae80394db6ab74f9e68a2d3d513cf58b3602ac6e63da8dc8be4d8ec0. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/CA5KR2429258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ded3a291f9f19e40d8c8b11fab84fd854bafe4cf3e69689d560e640199cf49b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2445019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b5a7e1e4649ae5511926770b488cc356ce7da4dcef426221c8e3e454fdd809. 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/CA5KR2448675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff91b267e521a2eec4a4522b71c7698a1d301fac1fb98162712875fc3f91cd70. 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/CA5KR2468832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c8d44e8f48aa19362ecbfef85a49a2989ffdd34885cb752eebe140d133aaba. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/CA5KR2468833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fe9f60adec4a73f9acceecf6ceb93b06bed1c100490f1b1c768405c33fc9ba. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZG2X2509032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45228756f9456aa0cc0fa4181d1fa140990bd1bf5ce0b019a120715ebfdfae1f. 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/CA5KR2337517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fd3179ac6f12712bf39651ab0b0630cb5bb0544c44076c7e9c9011896d967a. 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/CA5KR2338377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa966a4fdc176c18edb2852d8f39e3270e96823d57e79f0ae13f428d840802218. 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/CA5KR2429344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6890bf7f5981ed96b5f84743b6b5a48466034138afaf7fa5f63f01202d2de9. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/CA5KR2367414.
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