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 0x3b263b575d1021b8fe320e4db6d60f7a7637e49f8c06bc7fa9ef853fefb47d29. 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/9ba4d5b0-4db9-4fca-9341-0c5a256a10d8.json and https://artists.proofprofile.net/proofs/artist/9ba4d5b0-4db9-4fca-9341-0c5a256a10d8.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 0x8f385b58d6c713b65976d380128d152dbc52476ff6358e733cd5cd024a46f59f. 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/GBSMU6277665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3c2278dd6344437305a341701aa1d5bf9c4672980efd3e3ca3835a5f619b38. 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/GBSMU8346329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0c5de091f3a41c037c8f21bbec8936e1efcf90804a0208665d774e8d5b3444. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:21:33Z), 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/QZHZ62044893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d107eee7f6220c3a2f836aacbe8721be24d230dd5cb3cd1e6f8b77e74d8902. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:01:49Z), 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/TCAFH2011496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab9af7ac5dbcef99d22d01038f371b5e55b5ab39e64ff7e4a65551ca93bff79. 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/QM6N22216139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba1a2ffe58c59ab5de8b5cfdb3bc570635ad55565aa23adf41c785d0bb18235. 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/QMBZ92258204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb674abe420e408282d3da58891f4f5fd57f35d7e09728442bbf01ac7dfdf1f0. 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/QMBZ92258216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcaefdbe6fab38bf93076a8c90d16661a7c93fa2e61c64de315694af3143f023. 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/QMBZ92258231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0577252ea0857849930a670904c1bbf2197f1072c019db0b3fe118557352a0b3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ92258238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998167757cd00e089ce761a3854c1b7d0b3214d9c0ac06152a5877dd0078e9b1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ92258240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a526372029a8e1a22f5a496249246ce8faab1877741a4956d74923524cfa82. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMBZ92258248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54f76102da9f2e36db25a08d3ba7a2f0f86f188b3300141a7903ff99dcaadd5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMBZ92258174.
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 0x71daea3e0f4d19efe7f22579a8f50dfbd661bd995ce489be2e92cb8afe41aca2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMBZ92258175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5d1a586374960836c4de6474b0a3b1d94d10eecafb66c245b922abaedc5de9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMBZ92258215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3665853239b4ae1c54d136bb86706e6a93d505d41cbecd093a908e543930a8ef. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QMBZ92258219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0741dc248a5e355a31fb230ee34de4828bc657e3d4f417a6e2f680c9b387a95. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMBZ92260552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebd7ac7362bc18f20a3fe24dcc9f0c696f33c621bf8aa353c76cb262c65a5ad. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QMBZ92258232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78218b8216c853eed84490dcea48e51424bd14b4dda2bd53623f5b31c0983b7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMBZ92258233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f82e9d797c7d360dcfe2c47740b3ed08d7fa4c10da4713248789acab34d8ca. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMBZ92258235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e4e75d05c89c41569666663dc7861a6f9729f5d128c93caf94bf30dba3b240. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMBZ92258245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543b4a8cbcf852efd560d2c60905c3b595fb968329b5071a4ee78f36daa8ea9b. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QMBZ92258246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5bfbe7c41a16ad121e540edff5d10447212ba479717275c5d59c4620a194f5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QMDA62237503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a0b2db3c6d83078fadcb23bdf17316abafe0495986f6813c936492e807f396. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:34:38Z), 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/QMBZ92358095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bccd60680ad750e85fd2481ce0c08d56d3f7302aad6dc72d6096a09fb135e9. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMFMF2425551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b26d668dedfacd3ad8872a38b2d7d4ff8135557e2988ff86a2ea5d0a591a109. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:49Z), 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/QM6P42556762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84248285afd4732fadc7a269b01e1cd62d02a8cc0709b7ec1dea9265428ef33b. 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/QM6P42556929.