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 0x599d839c43bff9fabf120232cecf057c4bf1ca014f04ca17b624f6502a912b63. 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/b2650cc4-e9dc-49f2-9502-aff1b179f82f.json and https://artists.proofprofile.net/proofs/artist/b2650cc4-e9dc-49f2-9502-aff1b179f82f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xa6a95fe5376892abd37d493c6a17956e0209337ac53976a5332352225d368d0f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR2274016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b7075b22a3d14143ab6871c0b590ccd7d5cd67030d5a0ffc886aaef84f5a71. 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/CA5KR2274017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefe5c0936c37fe277566b5e1c91bc08afaa717e8edbd99c76c799a581a63ac0. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CA5KR2274020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c24d6ea581a422c0a9fa0d065be17dc0af75c0d3a8af8b6981e37d2aae015bd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR2274023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e46312d1ae362f22dfa1bd047bd6c1fe58ccf396452b40be7551f5ddb0cc23f. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T17:08:14Z), 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/CA5KR2274030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcea7b0f387fe07ee1d05bf0293b1a9ee76398ce52183a1426c02f892a71d57. 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/CA5KR2274031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281c53b9fd1c54b8558ff11ea8100393bdeb29df758f0d5169b9814ddbf21789. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/CA5KR2274033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd0cbfed2f4aee6f715017f217e80ec95a5419e5d64daced213795ce89d6407. 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/CA5KR2274034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6859137d2ac4948a2f933933b389779b068a85f32cfa42202a2afce9132e4af. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2274035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a34b2a9e089fe489481aed248d453aaa0881c96028a014246ff472c5dbd23f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CA5KR2274021.
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 0xac30184c4c9f2a90de4205cab3367ce2285fb031fd0fe208fe1237362d08d49d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/CA5KR2274027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfe0722fa23981038a8ef9a3b3d2879a1cca8517a9ce4d8720246f6b735aa9e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:00:52Z), 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/CA5KR2274038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e31ad094f5569f62effd7b778a8b2fbaf9be689eccdbe50d648e75f2ce44b9e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CA5KR2274018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b6f876d669c95abb2d51b978a32e53a82e2df8c308aae3cf60aa6db8d1320b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CA5KR2274019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8bb6625d7dba7e820cda939af2210ede935dbad591d2869516a3682b653988. 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/CA5KR2274022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7868ee70e937f235220e9d0126db8bc36afc21dde5b80335b678c016ff472e. 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/CA5KR2274024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8cfa137bff08e2a22e1dc7e2846d298d4cd012b1b086bf9280f6fa1823a76c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CA5KR2274025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce10263d3dfeb2e95539aff18b9e091a5788075cccbbd1fbbf0db19d6381c3a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/CA5KR2274026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf8dd23c9a03107ca44c6882a70612a89207968a3888880480c097701cf5110. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CA5KR2274028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dbbd4417df5cf2bd8807784691f3a17e46ce2ef8407eb47fe03ed609cd92d0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CA5KR2274029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a0d219f73dd15b5534964d5c40659648007b0096a78030efc4a8aefe3db837. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CA5KR2274032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555d7f4e896daff9a0fc7b5dfc88d9e8fa8b61182898760218233951d1792433. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CA5KR2274036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378c2c0709c40184c9977a7015bf70b49e730cb6cbc892c5684772cc34961254. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CA5KR2274037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ba76f6d95711f7ac5527214838040fe93a8dedd1a10feef127a77b8811d464. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/CA5KR2274039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35cbc0da32de4b4ed2434c057b86d7b4628fc568de7bd4c6aa791739da6f317. 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/CA5KR2274040.
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