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 0xf7c525a0846199b010714134dbb9d1d9f748d9aaae490707061583c1c1875de5. 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/0b3ccfda-3f4b-4dca-8f47-b5aac76dd20b.json and https://artists.proofprofile.net/proofs/artist/0b3ccfda-3f4b-4dca-8f47-b5aac76dd20b.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 0x16c753fe0f08a9665c19076e36a8c64c511562bd7655b1b7927d9ad0c858ac65. 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/GBSMU5548013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbcdbe0d2dba75cfc89d3f23dfa925dec14d830b694f06413ae263b9bb5434e. 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/GBSMU5548025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004cd9c2434af2bb56526fce763c8603d230007a4f5ef0a5124b42f4c4c19e28. 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/GBSMU5758627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ee88c67a7618498704b42b378732d4651901c14cb9632aaff47fa92de7e345. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAEE1986091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a49ca4da933c1af8b2a86fbd76f758c4b32ec5e6b9a15ea490b8b7b9a3c9e42. 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/TCAEL1908715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67852cb0b5b9a0ca0ab5bd74ab23e0e9cf7ce75787cd43e33a5bb60257fcbbe6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBSMU8249086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5cb46803c98b9443c28ece9df4f57d5dd7ee7239a365b7e17e129e311eac47. 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/DEAR42078129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d824c9d5678d74c1243fc7bd3d1805dd47ca6ccc103e68aaec09e7887bb918. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEAR42287604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256a3d79ed7135eb37ea30eda4c8306366e5f3935bfb68249c5fdb9f4c64d106. 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/DEAR42263357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf0fe7e45f540ab50c7b11e45849ff2234e413697c449e297cd0059a74e6ae5. 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/DEAR42265260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990852ed75a59a780418c88d0b6a67d0bce0cd2bb528e40b0e9fa96c548ce8c4. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/DEAR42364883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd8669c08be752de211d1799aae6fd2ec6e13a5ff0e5b5a87e79ecfd6ccc8bb. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DEAR42459520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ba12277913b40480daacdaa25384c8450e856a5c1b5fc4407897fd9cb8b736. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DEAR42599734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26437598dda395c263aedf758e22701a7b44430566b76bd4989371cf072bfd09. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEAR42599994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544316c52ad9b62d4e17692f885fcc936ae0cca1eb1a828d0719fe27778d598f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEAR42535742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea48ecd8cc2deb836d9ae954686e252cb51edae294adb01994d252a421b6f90d. 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/DEAR42535627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97d629e131e1221c1c4bfcd8701002ff7aab8ea07e150b03c1aebdf8160119f. 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/DEAR42535634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd30a8d382c28652f2e70bc3a8d9fc3152d67b92837c23aea0300213ba8c366. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DEAR42535957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddebae779c1d7f48aac3032adab6ffcebc9596bb0a3239e465e75651ccfae7a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEAR42535969.