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 0x8cee3b1f59879a1e15db4aa566157fcaed949a3c647b7b02923552f6023af175. 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/d5dbd270-7a81-4c09-b323-78cec946309a.json and https://artists.proofprofile.net/proofs/artist/d5dbd270-7a81-4c09-b323-78cec946309a.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 0xab869808eeba5f13d7290ac826e93a901e1805d2767dedc0d50117d6e4f0949a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAES2006586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7644c4f4e173deb343fe899436cfac80fe02a0f77e0ae4de24bcff5fb2de11. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAEM1969723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74585b189a3a5082b685cf1cb64e68ddf2b7de94e60cc8e961c3ffcd2fa98f2. 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/QMBZ92038530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67511c33cd6183752c1ee2db4c955868352623cae7eeee262a35ee9a68982f2b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMBZ92096506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8deff27d633ba8006bf02f86732925165cfeb130ba20cca122e2c2b42e40c08. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:15:10Z), 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/QMFME2027669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df4b65d6545abd5004751840a870f74ac24e3227d3bae544f897da34f8bd086. 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/QM4TW2266811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b545fa8f444e5e95f300949fbd3fe4c458460861c28e9d900262752fb8f24f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMFME2163230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e41efab9976059420d3986b566b5bb9efc6a1fd119bfd66349b99318e9a601. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QMFMF2113933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df4b65d6545abd5004751840a870f74ac24e3227d3bae544f897da34f8bd086. 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/QM4TW2266811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182020055e1dd1f38c86f1834b26df67c45c6f8dae28a3cc91cc65738e3a822e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QM4TW2367986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905627a75e71e564fdca24001cb160be26bfb1de7ab775d2beccef2c45d2d3fb. 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/QM4TW2367831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df4b65d6545abd5004751840a870f74ac24e3227d3bae544f897da34f8bd086. 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/QM4TW2266811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8deff27d633ba8006bf02f86732925165cfeb130ba20cca122e2c2b42e40c08. 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/QMFME2027669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eac33eedf15b410709081237cf7734c09f31086e8b72a44dcdda7de2979485b. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QM4TW2367963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f9a89dbcf0a9d23eedd7ff898d619b5800d20af5585a1371dbc59a836e3c43. 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/QM4TW2367941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e41280b1afa94cbd3365a0a54bd330b8b0d71cd066819b3eba9f83f0ea2c00. 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/QMFME2303471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3312bb66590a9961a2af35a636cd91d2ea2de16472b5b92f9aecb027c931f7bc. 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/CHUM71400422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c89c5e63898eccd77a4f3a37cc60d82df94f2a6c764e005ea1eec79a0b80522. 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/FR2X41900921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c81b0ff2dc1f748667fe7952aadef6c040efe9752810c4b22c5fb27eef1c39. 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/FRZ111501051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cceea0366d5f7a200cb5128625ac7ceec2d19ed1433278f05076d7954292611. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR6GM1300160.
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