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 0x93dadbfac3395e27b24eba3d0e05421ecb8e28ec0d848d8043e08b2f07b8c277. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c06063a-e11a-4f42-b5ea-23ae59c1466c.json and https://artists.proofprofile.net/proofs/artist/6c06063a-e11a-4f42-b5ea-23ae59c1466c.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 0x228916269cf56f333adcfdc68d658e27b72ea7f3bb8477e2f17f941fefcaa9e2. 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/QZNWR2592394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5ed8187f0f05b2785fa548a22c0100c4875d6a6a52b3cffb884431412dad10. 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/QZNWR2592396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21ed79dc04611ae8fb7da81407d3f1f25b9b81006a457c38c6b95e5b5e41389. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:23Z), 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/QZNWR2592397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9bc523b8d0f1e60214026e3715754808e9fad185ee61b5484521ceb6d45588. 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/QZNWR2592398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fc1f56ba2148d16f6bb3d6d7b7b49112c4c9507b34454f07faa08d92885245. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZNWR2592399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff38de7ee32abc087a3d2a17d993b05400b527354b8c0749c7fd46e83b1610f8. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT3F22545487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02d5af8e84a67ff2692ecf74eff479fbac2bde4433e839b95349f221edd2907. 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/QT3F22545488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949a638614321f7dcde191a8eed09b73db62a8f6f7404a506b236bac778bfb96. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QT3F22545489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38230b4e9dd4e485a9f6bb97e3a1e02e0b99a787d76ec67c21167ce33d39c68e. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QT3F22545490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2f5d05ba4de3e4057c3d4034ca63ec4abb6f2cd49660900873aff546ca4f8d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3F22545491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd44c52cf1d4fa39a2035a2eb2187c04c029768bde3caf26b07755d12d0f197f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:17:46Z), 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/QT3F22545492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac14ae44cff33d1c7f68757c789db52840aa066c3515c0f9d8a27cdece49d6a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7U2543543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278fdc79f72fe4870fa4d102c778dd3af36ee946b5a33479007f9182991f10c4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3F22545493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4b5cc7ff341e0232accf1f39241a0a7d037c23610826224cbb733d58e4c49d. 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/QT3F22545494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf333206d681a5aa3e0c591fb05f98d0e8ea3497f01e23a47df5965953e18d473. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT3F22545495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf036ae650046efd03e33f6b262b110682d8cec135b7740b66df47e82b5e886. 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/QT3F22545496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3829f4b74cd17d0bdf9560b37bad5fffcf65b436da1b607e6a21a8857d43e0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFV2575620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3014ce70fbfbd682353820dcc7ebd20e6b9dc73f90ad6e30975edb5d2e86fe04. 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/QT3F22545497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75df9d74cc818e8fa4a31255c1e072fb8494bf5ecd95749f45d0685274d4366d. 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/QT3F22545498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd746a67d53991936276298f6b8207485aefd014f6a33c8dbc975b63d75540459. 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/QT3F22545499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55ad4caa53c4827188c437d3445609a583c9aa4155d1895678dd368413c03ac. 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/QZWFF2530150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a4ce2f7a08195880189585356383387ab9630e74463cc0331f4f4013dc5419. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT3F22545500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab82a99d4c0c15e1c8a771240631ae3ee889a23fb4126dcb0888674b3e574cb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT3F22545501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82e48997879a0949771bb3a7a7536ae36fa7637272c9e123057bca61be2a4a3. 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/QT3F22545502.