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 0xf0c2cdf77b72c0727e9bbf342f68a040c25befb9a287152c6c10638c2a2cf4a4. 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/b796ee4e-da13-42d6-80fe-ad74b9124afe.json and https://artists.proofprofile.net/proofs/artist/b796ee4e-da13-42d6-80fe-ad74b9124afe.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 0x38972455ce6fbf535b843920d5bbc2655c084b2f00f07d84dbfa62e1280cdc21. 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/QZZ7M2590623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb520e42de45e7ecafb5aae7ff39583b984578fed0ad30ecf9de24d9f2d0071ea. 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/QZWFU2526749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8b35b4e515074cc537ca0d591d373565326896cec34442e388391232df04db. 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/QZWFU2526748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723647f88fe947f01774399ed5863cd881bc1cd04381ece459e516fbb034f99d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFU2526757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7f162533a8a83af24e91adcc8babd5ec3b5f0aabcdbc37baab082bf0145f87. 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/QZWFR2581256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5a27b051ce4deae6efdb61913ceb15123c872bea3d9eb073381c4dd3eaa9df. 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/QZWFR2581329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346b70e67ebbdadcb27a5a99d0237e244f638c760e5de14becfb76183b704c49. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7M2590458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0d5b4aa4488b910384b4519dc0e1f540fa12b2efe64e8ddc64e0681d018a57. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:59Z), 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/QZWFR2583887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4980386c3271a5b4b436a14bb5d66cf4b29b7b576e851293ae366f4602e63e. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZZ7M2551285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12342bd74bfe9506e7a21c9ba96c5de6ff1da4ce4f93814e46d6fa3240dc57f6. 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/QZZ7M2553938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b42e98ba02aa2975506d3ecce866533ebad17615f8c78b80671542921bd8fc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:51Z), 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/QZZ7M2551067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7eff46c465225778e1f6da8b933e6892f63e66264f511c1d95fe309a1fec9f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZZ7M2551051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cdadeaa8558ad17f149d81be70a66f76ba570a1acc1b7ed7a1b4f3b59b2c66. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFR2583924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1aabf2d8622070749f6db3e365e9c960d51834874c8eb0e9e49a6c91b5be95. 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/QZWFR2583927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1191e25895c3798d13999bf4a0912fd3e5ac8180c3eb0e29ca216db400efeb. 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/QZWFR2588579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bb919313ece5060633b0838933d1e020d2175f3c0b27c745cd78b5dcaf2eb2. 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/QZWFR2575265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f92202d12d1f52e95b1bfa904185fa3fcd3ca559d3ecc9e7895c2ff5c95a7. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFR2581416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf705e49cbe2249f023ad2d7c2a3e1bd75e7b84177732019077b8bd5afdae48d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:51:25Z), 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/QZZ7M2550914.