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 0x2f2c26ef55777b26ff49d0fcff3fec7efaf791163ed6f08df11d7c51f8918e58. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1483146d-fc7e-4f67-8557-a66838467703.json and https://artists.proofprofile.net/proofs/artist/1483146d-fc7e-4f67-8557-a66838467703.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 0xf578c853123e0ce6ce89dea061d98351cacfe1cb2fa7f7ead1fe3e4f14378b82. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/GBLFP2260496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6cc6d12a428afbab3c33f6a6e4992c9c184ae7d174d8fec34bfb8332f258b6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GBLFP2260497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72440b469c71324bd086705168d9ef116a20879574860aaae71f74d2d165689b. 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/GBLFP2260498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c231cfa615c4729f59dbf85330ef6e8cd6dcd1e6290207de855fe7bf69c4d70. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/GBLFP2260499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48581a4665f3c96653d272828f68a621d2ad02c3eb7ec27b4044b46735313dfd. 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/GBLFP2260501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6036194b62fc8453ce001e237259947bd2f93b22630344525f32fab2bd081c1b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBLFP2260503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7309cdc410975995321e78fe291f867329545f178f3e8b2de2a8eaeac85be73. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBLFP2260504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3a32c1ce706294c5a44d58099ff4a260a6a0d11dab2e10ac621787d729406c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBLFP2260502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e8b3ac53218ae03e0d5e85cb73e562a50c6c191cdc89b47f1a6233babb136. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GBLFP2260507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8b4f453d3dae87e4a37d31a52cf3e614e67b33be121884c0ae8d6a94b5c08b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBLFP2260509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58220c9440783ee71b4f8f55ddc6172c302876deee47a3863e52749fbf0a6d0. 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/GBLFP2264544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0673c20b5d8118e0b7be00df554fb455aca416f0fa7e9ac15a4f16a4116a71cd. 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/GBLFP2264545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35ff82f4de752718b91513e8d8ec1bcad521883f2010f7d70e0fd5b57c6c33a. 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/GBLFP2264546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75f511de15034c77b7356c69711ceba1020db78c336ba8d408978b084ad7ecb. 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/GBLFP2264547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9121921243214ceae8fdaa1a27e0e67313c49e45c6e3efa8d5320644a498d63e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBLFP2264549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7a4be508d48bc2ed3d5c4dcfc1d30c4c8f842a3226cc23c255a4fa4c6cd967. 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/GBLFP2302533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ce28fb5cea2ef195a3dd56f3d916cc676faa43aab7219ff3dc032e5716a9b6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GX3Q92484626.