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 0x7ac76e2f8ad8507b2921f9cba592e5f8466da1730c8afe839f2f7af1e14286e0. 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/59138471-dbce-4232-a94c-960dd64268f5.json and https://artists.proofprofile.net/proofs/artist/59138471-dbce-4232-a94c-960dd64268f5.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 0x53797734905de74ced1b37543bae3db5c85d71ab536acc83c352d8bb4e5a05b2. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SEBGA0800209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef55b817b6ed34781875f0d0b39f3c489511bb1dcafa232ad81b0e845812a3b3. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/SEBGA0800210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad44e7147784d4af757cb1f16416dc3b6f8b21161bd1c212b74b9811a2baad28. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/SEBGA0800211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a945d852c51e9d6b48f6f48ee27c2ba826cd18265df973b4105db084b59f32. 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/SEBGA0800213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6b77e719038486122a60c1510e56248a4de31a841b42df28d2edb698dd1ccb. 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/SEBGA0800216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f519ff39f3fdb8d4075be1d1c78c3c93f657f74103bda916c57ea32a4b4112. 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/SEBGA0800219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e236c1cbee27c489e94516c4db6822e970f55295bd25f6be58af4dcb08498a. 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/SEBGA0800220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8460c79980cfe50730e512524df25cac587c3bb1dbe7cb06d4d9e6e4f771bd3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SEBGA0800221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af6d05342713c14891bba308fb4a7291c293f04c27bef4286b3c6ae1f25b08b. 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/SEBGA0800222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75169a48d2a631ffb6216390f6d077ee21f9bcd9f59ce6bafa47b7fa1d7356a3. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/SEBGA0800223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb798db6a92e0e21fefe405614c3c68644149d119c7bd702ad5125bf14eccde02. 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/SEBGA0800224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e031305e5085cb4c244dd9cb115bf001427af72982ba251dce45443236c5755. 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/SEBGA0800186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378e68cc967d72631a5b3ac54db383598e40cdd7c8ed7567dc6daf4ee7cad586. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SEBGA0800187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56cb64510f2f944405d57f40ba389f7a1374716f97ebdf6da3854ca2f87184f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SEBGA0800188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0367fe1bcdd2710374cc8f151b8eaf249cca35b9317884f2feb3ed687ca584ca. 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/SEBGA0800192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad23d9677a2beeeba00dfd76017056136dc4f984c61982111c0b48860c3bf43e. 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/SEBGA0800193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7254fb0d0b2076a9f0ac9d172580d441139032eb7579195ed7e636cdceddef. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEBGA0800195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f666e8f43f8f610e0274af84aa7eb163f195729327ce0005decfec2ba4d3db. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/SEBGA0800199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3a2710d5b8992b912e1bf171174f4d55436f5c916816609432f3fd4a5e63c8. 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/SEBGA0800200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb629ddb70fcc623829fa3d5243909627fb4c1df71c0247dec4fb6baf55d4673. 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/SEBGA0800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f03dd0414264347058b24ae9e7b6856f074cf9e442609dca96aa33c83d70fe8. 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/SEBGA0800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f397acbe795bbafbe0cdd8fcdaa46b5681a05d026d6f876b965d8cf70f5eed. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/SEBGA0800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3535006959a06476bce0bbb193e05b8da4318ae93bd443835b32a41e83cb3e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/SEBGA0800204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3288fb8f4feec948610c6b8f8738cd9f1332ef3d35a3d3104689f1323ef85e79. 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/SEBGA0800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b55c8fedba04f4a120c757bca23ca233586749db5a8bfff65146638b9f97b6. 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/SEBGA0800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb4a796a9f54b1cf1da227defd5d830d0ed1a2031931d8c2302c43158e93efb. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/SEBGA0800208.