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 0xaeba16b84b4b5e7e4a7c62947187bffb9643265ffe3dc8c5758fd5a44b2cc359. 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/d466eb37-45e9-44ca-8576-62b2a4e9b7af.json and https://artists.proofprofile.net/proofs/artist/d466eb37-45e9-44ca-8576-62b2a4e9b7af.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 0xed1fa969932a394d4e364cdebc22096fbf047e560d3ee97867a24733d4c2f5d0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLCK42415435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b91ba3af77938fafdb2a4291ed0b5af9db3fcd3e7f50874acf14bc4c4be2a9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK42415437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669405fd39928382ac7374eb592047ab4874dbd4c39bd7c9e9c3770cdaa957c6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK42415441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a7293cf4268f02f84aa449bb8185dad04f03038b638ff3308335830d580cfe. 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/NLCK42415443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dac669743f0dc7e80510a653cfc1b0243df5a8eeeda1f324814490d9464ecd4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:46:05Z), 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/NLCK42415444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09668391d357f7006271d2be01dd08fc785155f26864b4a7d29f2cf303b095d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NLCK42415436.
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 0x4a2b842dc395cd840c2359af41cb92fcf708270a84a6446d81afaadc9ed1b6eb. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/NLCK42415438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6417d86c01ba6debf2e24e9be9e23d4c6103b04ade557f8eda88021b3bd0c703. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/NLCK42415439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf694afeb71b2fdcba673c6fa11923e378ce2bbcd955aaa1dee1d978831909058. 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/NLCK42415442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb5c2f1243e51c222e845309faa0e32db729bd71136c0a3ccb58444ff33c4bb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLCK42414678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3c8ed62676864a1be7f72c4af1adb5d39a35f88fc625ab12fa77a4e001379d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK42414679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e352dbd90e00e680d91e9c35ea2ac7ce8e6e337ab85c678481e9c113fe69309. 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/NLCK42414681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2497e8d32bd061825d96d157bebddb457b6a1e5b00463d4f6f715034b743568. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NLCK42414674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8902f809d561ad19f0ab32facf5bc57e9c9b40790df52a06ed675a9fce1a4ecd. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/NLCK42414675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f13835d3d2856a0e2c30c95bf1997fa8071c783317fa285fcd12f451e2f0f7a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/NLCK42414676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dfa87a19d13d2c685c775b88d500b040c3b1616e9323f12257e9403906be57. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLCK42414677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e8458012d8dc8cce9521f6d762d466b5bef4e9a56a5ff7e80182ddce6e0980. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLCK42414680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904c62b5b306cedf168ea32aea3662c94050f18c510739ed89bed6a5c4086bbd. 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/NLCK42414682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f3b1e496e1379529acf226457513797b55be4a5484c48d5a4d263a3954d3cf. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NLCK42414683.