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 0x7b20f3e6d42fa6631c1072587dc562ce817dacd528c5563f0ddb611541392f18. 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/10f118ae-b7bc-48eb-8e0b-5776b9cbbc7e.json and https://artists.proofprofile.net/proofs/artist/10f118ae-b7bc-48eb-8e0b-5776b9cbbc7e.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 0x3e15db574ba1ff97df6318c6b855c98d8621370a3d492430b8a4c47e036151d1. 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/USQY51046161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1332c710348418e5a5d5c1b83356e677f7e81ad59de4a0741d357b20a6ab701. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/IEBVV1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f86245dfda80e80a62de66b67b88c1e7bde4ea6379f041f9f449032ddcbf892. 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/IEBVV1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c442675f0457020687652b41dcb92e2eaf50cabd6b14f25e465ecbec100012a. 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/IEBVV1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8f7e85ade662b7173069d08d32ff2df0a8977939e54e26aab637593cbc7e14. 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/IEBVV1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0864eb5099f5423876da17f5b4a8d7ca22e3b577932ef34a0b6668d94aeb77b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/IEBVV1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10bf3c3a489a1f5d4b60c4efa7fbbf349c3ff078faa152d136d5a2671be7e50. 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/USWHN1200949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e8222eac69f337d874dda447c17b2b593a912f3490da532759854df9abf1ed. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USWHN1200950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acf9219759af0efb20c0219cb4224601648787c2d05a7caa7b2b1bd1c64fa04. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USWHN1200952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6c2d5e7c36579a3d5d91f1b4b5a04a607449559a02d581d5f9a6533cd81a42. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USWHN1200954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56543eccaa0d4b622c69f37c0c77de703e39fd9d38158aaa0c0f018821d4131. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USWHN1200955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd9f5807d78de0644021b17b2bb829710aad7c70a8a98a199ad33c19a0c2bb7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/IEJMC1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112258790dcb918f5ca90bffed30de77b5730032ec42afa2bf323830e0a01245. 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/IEJMC1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f1c0a6949e44ed0fda385ddba4686e18fac9c62e6db682e80d95a39b18d2d8. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/IEJMC1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd9f5807d78de0644021b17b2bb829710aad7c70a8a98a199ad33c19a0c2bb7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/IEJMC1300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299bc3ff295e445db42627d34fcff7dbe2a67098339446d599619e7aad59616f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USCO91768401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008564cd9f184c81d697832bacad26864b4d9bb7534462e2b096cbb18d6d9563. 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/USCO91768403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe636d5aea755e4de2ee5857e976daa7f859394107f942df2e189dacdcadfce. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USCO91768404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a8b9e6cae739100cd409acdcc7171871b7bb2b177a10fbbcd1615721e42b8e. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USCO91768405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda93c47d1e94b1626e374182762b18d85e5473ffd3e20ac08c6053e876a4811e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USCO91768409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30f8b5146202ac50d893361dd00d29b0cb0d3200be4a0e22a17806c5bd1bd09. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USCO91768410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d633512191a4448f3aa508812ad8c82f0cc6a5ef33b022e3e233807cd3ae2c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USCO92280004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7744275327828eb7f657da4c75686183b37042bc3cb7875180cf6f39d56e276f. 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/USACX1301731.