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 0x966d0f4f5980438d5be22f7331a8dea470c6df7778e6a80bf23c3d7c743672ce. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa52589e-f15d-4ffe-a4e7-8fcc467c70f5.json and https://artists.proofprofile.net/proofs/artist/fa52589e-f15d-4ffe-a4e7-8fcc467c70f5.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 0xd66b36189353ded7d053291e0c5718eaba9bd1aacc013eca344536c71aeeee6b. 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/INW131915341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6253a35df3b5c9d17c818d24ef0d867d849944dfc58317ff5def7386dfa8d933. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/FRX872202025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6b58b38ac2bac8742d6760097bfc3ae593012ed45c4cb96141acf515ae8b75. 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/FRX872201961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e2fcc096980fb9003e61dbb031b146017e599c7afd6b4a03e78ab1c73c512a. 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/INS232011293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae938a3480bdb200a402140ad78443f8945415b8074c188b5ef75cb1a71db39a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:19:27Z), 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/INS232009743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167058e8b6370dca7a145ef606d5fde8d7234d7f8588ab7f59d8600001f75fdb. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/INS922100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e6d5607b585feff079f1aa420e69c1ca3c8aa15995a1e74a5ca8a87fc94237. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/INS232017436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d999ba2fa9ccde1eb9b9a4f929e190c06eb5ea50b35dd428c2ceaa3ad2f48d. 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/INR732100578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbb6e94c277ef0f7d565b73da21ca50b344717acb759149805d9ecb5f7b4472. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:39:34Z), 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/INR732100788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47609286b83b21a176ba1ffa623b1796f7a47efc4e058dde9580d7f8ffc52722. 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/INR732100844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc820f92f45551a23871c316a9b083bfa8e752bfc997152c47bc35711a54d933. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FRX452282744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea13a988b76cb274025b3cd5373c9a7600915ba4692364a67532f9e52345c5c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/INS231800197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd5b03d8839b67ac98efc1498f1fb6b25f6f52aa80dbe776c6df9e2aa230eb9. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:22:17Z), 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/INS232201342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc866eb6bc6053246b59be48ac57f39beabc6f6adae78cf9d3182506ccb40fe75. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/INS232203609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc342465377eb063529758460598bc3f4bd68b0a2218e592a4a40dadd7a6a691. 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/INR732300688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b19d26554b0eb27859651b19adf7ca78b8a438c49f33ef4d3831545ceff114. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/INR732400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdafab45912026c1ec54bd80f8a934f0e7af0bedaafdaa9bda6f219b9473a774. 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/INR732400424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa4dcb7d3156a76783c9b1f2c997302f5e1d0f1346bdf4eb418a81e340f33b3. 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/INR732400431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89074373a3c612d36b34cd6d9db193c2d92a07034eaf4ac25cc374b5205f4b3b. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:28:55Z), 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/INS232210079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dea291b4e2b9c7faef8ced3f7ba4fa32e53d48e64595166084f9bd56f01187a. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:03:23Z), 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/INS232210158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007fed5a520b007ff26a28eedf3d2d6a74b5cb7ecb25ec1f6d6b194c9e6cfceb. 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/INS232019561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdcede196c2db558a6e5571fda7986bd67d5a62b9c1c5d2957339675ead8f74. 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/INS232019568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68781c4103942e60e9009b0e4a6d9921358953ab85a0b8ba23d124f8709ee2fb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS232019566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5714ecd1ddfd104db4d734a732e0ab2750728d33adae993e35c9437bcb0f2d7. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/INS232010323.
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