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 0x5724eb94053d914046a76e41930d0921d4808bbe66dd1d066ddb1a297d409cd7. 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/637ee12c-8881-4b94-9ce9-51cde2116435.json and https://artists.proofprofile.net/proofs/artist/637ee12c-8881-4b94-9ce9-51cde2116435.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 0x2ab81644b3ae9617d7e474f5a7cae1d893d9606205b840215fa93571aa76194e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US7VG1547105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c302620a6a19ace98239db33c252ce79ecf8b861956a8201d12dea6c2665615. 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/US7VG1607212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7529c23e6bdcbb4ce14dacf940943d703dde5005b7ae9f36c512546645ae97c7. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZ5AB1634919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8fb49aa1a85d068b29a66ab0263613ec4f8f2504526e292ccd19b25765288f. 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/QZ5AB1648730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d06fa823065707fb1c1e5c22eadf23a012d354ffb5c45d388209ea4490ac1e4. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/BXG6R2100637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caa5873f4d1e92a92cb40eb83962d9f11fd20621575daec961596fec858c4a8. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/BXG6R2100642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66eb43ec1bbfb3d182e12c9847304096b50cc4bc2cb8eeb8ecdcd2122423f70b. 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/BXG6R1700427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e31b6d8007fc375b344bad674df9824ae059abdb11655c0e3641fd9f03ef4a4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/BXG6R1900781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d6d7a6bb38de5b7cb693e70e11e587af4abfbf50e65e4b0af33c22c5900d29. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/BCBIF2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bfeef12a0ba300a99eea26c5115f024dd48d3c8086c82165f838be75647989. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BCBIF2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a0cfd4fb9b72c26689cdd19af475695b184a6424f90efcc21385386b07fbf6. 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/BXG6R2300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41446ceb2eb03a5ed2abc56f4ca9d4dbb988b624226e2c5fb79e50a8fcaffcba. 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/BXG6R2300511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9a418d3144c3a4565e537492da65ab4b5446891de0d1bb302aa6b4ef265610. 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/BCBIF2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bea88ca659ec695cb0e2a803edff8020661c0a7a808cb92a5f7e12499a7813. 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/US7VG1547133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d5bb38f8d9b571f783378d4827e45b270df498f7a14d7acbb4343958098de8. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZW9K2220666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ba63b674f3cc88371bc8a635e1beb91b7fd34868ef212c6e3c5f08a04fffef. 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/BXG6R2401089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdeac120878747fe7e79e7787973fbe4a019b1d34325583f1d01fa19fbe303f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/US7VG1547155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc5ed09cdba8556a665dba16ba5ea5e1c9b2f7c95f54ad9a488df5e8c43a17a. 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/US7VG1547156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1023f69a4b58da99de9ea1b81d3177e61794552dada840b3096f4aaf74ce1704. 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/US7VG1547158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ba63b674f3cc88371bc8a635e1beb91b7fd34868ef212c6e3c5f08a04fffef. 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/BXG6R2401089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9f9d30dedf62c465c902636d21ef7ba8e6dc8d699ad658ae77c6be82a2bc9a. 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/BC3PG2200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17df45768193aa8154ecae7b77de97c3a32f62b1d778ed41ebc6d4cead65acf. 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/BXG6R1901405.