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 0xde0520a30edd69f7ee0032a52b401a18c3fbacee49df743f3403d9230890ef1d. 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/54cfa9f8-3f4b-4ef7-86a0-79aff3d4c3ce.json and https://artists.proofprofile.net/proofs/artist/54cfa9f8-3f4b-4ef7-86a0-79aff3d4c3ce.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 0x30eef21a5d8628183334028af8bddc2cf67c0cc2a3e78f4594d4b79ddc8a8c7a. 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/AUMEV2255330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18097c8407eb727410d997aca752dacdbabafd63853c503f27ba083e0a7ae899. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUMEV2255331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a822d81fb0ca1540c41a2d034bdbd972231b7272a43f47010bbf28121db8e50. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/AUMEV2255332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc154918218f4468935307e9adf453cca106e3ea7d38df1b9fbc2c75a3eb7d5a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZXLZ2387881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd862dc321c779a4bcc503ed087e905b9021fdcb89fcab5428a04d4b0331a68f3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZXLZ2387882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567332df590057929335ee6df4c6cd5ccaadb9ff620a1b7c99ee750de2d6a05d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZPYN2366951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e70c78f6a42a77d44a477267efa827eabed4beb908ab50cfbe280567fd48e4c. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZPYN2485976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cefc6acb0bd60b39d3ff5fe8634a779c40a89a8129bb8f030674160cdc3ca15. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZPYN2485981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa429f9b2f5eb91d8559e58b229bdfa1b811ffe179262fd957176e018e01124a6. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/MX2331600162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fb4014140a467d080da44da2e37e91f89b08c85d79d483ef8b7e20ea40613c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/MX2331600163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d2a65e9845c2ec1517eb25ad9ea42f5fbc5bd02c39040d5b138629de550e0b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/MX2331600164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7521b59541711849c9da9d981e6cd151ec8b5be0172f3d135e77d975bca31db2. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/MX2331600166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c47e1d400074a7aff1ef1a5ee8b32bf34a7cba5bb461b100050c1fa125be03. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/MX2331600170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319109ce23176510da56007b225089be6b6a116975c15ef3360b0bcc30634de0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/MX2331600171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f1712045130d00c32380c26168a83ee5807ecc3a5513641d9d633e37a3846e. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/MX2331600172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007c27ba0bb5c1d8e872dd38529ed4a1ef2521971759a0e16d4ba9b170151285. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/MX2331600173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a344bd66fbfa557da5c6c161400354bacfebfa1d0c2ad072f014e9aac40db9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MX2331600174.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c87016eb142c6ea760ab3ef9cb66a8134e69838986d2c9c93675739d0f7e5b. 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/ES5159919001.