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 0x8c81e615e8abf22fd539b957ed42e6c2b6910ab5e3739a5f5b52db0a14ce9f37. 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/1ca107eb-25ad-4b54-a939-c7c1174ee13c.json and https://artists.proofprofile.net/proofs/artist/1ca107eb-25ad-4b54-a939-c7c1174ee13c.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 0x31bcdf39e062f77dfe961d8dbcf36058dd5c19132e2df01f93ecc1d4b7d42792. 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/TR6791800913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7905c70dda103f5d57bda410d07632fdd53ed1748f74ce327c43a20e190e6414. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR6791800917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118676328d7ceeaec750d268cab6160eb563583b407f6bc9b3c29349fba13cbd. 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/TR6791800919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1146c8aabf8d7137ac14c775a7a8effa6ec5237c618260127237b6061f66c920. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TR6791800921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f518a5d6614345c474c81bb0fb6582ef6cedce8ff0032acafc4d85c61fd284. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TR6791800920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1babb05930300a644050286610c276c951ee2377c09b6ab1804dc33ade85f1d8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TR6791800923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa8604d0cbdea3b7e02111e98ce73cd54862ebe489f33c5a488c8876d927ad1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TR6791800922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54840aa6ab434e2e398f6fa3f4391bdca46852d350d32d2d92e1e75b2b091f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR6791800926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8924aa9a9a0f72af529164c0c33a86bd9e7c088b570f067cf4945da7b95e6573. 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/TR6791800931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6894b508940e4858bd7a9921be532395582ac6f87dc6dd7206f512c27caae67f. 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/TR6791800932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc418cb7dc962d3ba909250423a19020ecd2ba2a0047fb68a55ccf8f74edbba74. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR6791800929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c8fc5e578e251173f54b8352936e8f8f8babfa69b8f24786c159ba149e926a. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/TR6791800934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93260abc865e75bba949b0d3242bccc76341b4569349802f6d9c5f8fa8cece9d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TR6791800935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3fb4f86271da8c117796f8801d3003559964ff6e96a3ebe82165000ad23544. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/TR6791800937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45a87689e4863e6a12d828adf06cd92265d179c7d2f6f521502df44c9027e41. 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/TR6791800940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce44d2feb8c0d63f675824da18230a2ed3e0ff8a2b24c9a529d8acc0a5c95c67. 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/TR6791800939.
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 0x5d0425a70507782b924e5b7c0fd2f763f5dce6f11fac0ddb147f51a16dfb5e58. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TR6791800941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659094888ac96bf4ed6c76622f1bfb2f0954d2aa7dab896698b54b61db0c2025. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TR6791800916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee34258c6a3d0816de9e51365615fc6867b87a6967c70209b12e4d41f2a3d64. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TR6791800944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13d24d8a5a922d471d69abbfa0b4f8ecccad5a5d9c2947e95dde548c132498f. 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/FR10S2387451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb439f8938db069a5564ba357e74c9c860a898f38ea4eb5183c17222952aaf25. 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/QZRP42189750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb78e387dbc6818207bcb986d8d6879025a335ff1d81a2e4065394e3bbfddae. 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/QZNWZ2195681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c44ce8ae872447aa317862650762928bbd6542cf71558e84169ba65289288c9. 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/QZNWZ2113725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b29e858d16d74d8d3d4698be1c742e3d55838bee563f3939ca6e038b1cba1cc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWY2137923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda48fa562d2ebc61014e6f768ce883e8ddf27c4191a3ba2838ab79169b19b88. 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/QZMEN2133247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1189cccffc8eb24450951872e7009666a577a08bf0af10fddaef2b816fc929be. 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/QZHNC2127700.
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