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 0x0f37905f741ecd8e92298fc252e14f4aeaa54af3f834858b72cfccba237720b8. 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/0b247d7b-260a-4cb3-909e-5f4e62e338a5.json and https://artists.proofprofile.net/proofs/artist/0b247d7b-260a-4cb3-909e-5f4e62e338a5.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 0x6cda34d14feab83ac2407b928f7300da026df7b689dd2456459502c45e6f6c35. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBGLW1500141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8126e5cd16ac07aa8c89fa9ce36d1e53814c75e9170a904ffe131091de50e0c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBGLW1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0c79b1e181eceb591a5eef16a0b4e8d08e7ed1ca5033df8589c739508558ff. 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/GBGLW1600147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7e12577adacc520d4ab421671af06cb9d3f6e529d477f495a271b52edbabfe. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBGLW1500262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110a38e1c9fc7a0b3723230f5ec76a834f0b656bfcc5613247a158918d8653a4. 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/GBGLW1500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186b4c7422836baebc9c377d6017f5141ca6c914547ad95b799ae3cee18c130b. 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/GBGLW1600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2334045213dc12020c258b1648bbdf274b5f825648cc2d1d8a3ced1115ddebf4. 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/GBGLW1500144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7a829d46aaec02818f228e8ee5defd29d1aa5f5ad952159996f134471ef74f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBGLW1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d4febad99aade6ed728b0742ee4bfa84c669b92e9065f97a493ce6809a1a78. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GBGLW1500142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ec6f17b1cb55ffa90f327a4210b247ceb2f65c8f4bc057b1cdc14feec09d7d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBGLW1600146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5460e2ef33bf277966587b57341e300b763a43f9cbae27678c9e921211b09d09. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBAHS1200331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b06b637cff09546c68b9103a31dd2eb8bfed6994b23702fce5b95f0224a6bc9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBAHS1200374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76af8f5d14cc3531e6b9502f096947bc1715c9998550ba50b5a9801c016cee7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAHS1200360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac991edf2232c22f450728bb80bbafb42d5c41ca5b340e945ccad5028482d436. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBAHS1200366.
John Davis at Metropolis Mastering, London
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8d0529159d4183d51984d8e214abe30f13367c7392600b14f2706ebfbcf937. 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/GBAHS1200368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b248cda5757b1acb10ac2fd609de3ab4ed46a3f939fbe09caa5c84f352c4574. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAHS1200369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea0157fd999f8e5a7bb117ae2bbeff80085577c3443acadad8bae7a8a6ea583. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAHS1200370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0a0776024cc91ebfb40dbb243ba6ad5beb8101ee18cb8e46c18761456973f0. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBAHS1200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafedaa022a8b3de4bb6ea4ae7b00148b51a71f6565caa1054e5b5174ac741ad1. 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/GBAHS1200367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3734827630b324321aa6842a7ec25cf3b8a089ef2a0223741a907a9fbc51bf17. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBAHS1200362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02219a91fc2ab1f4f0c1a08af86d05be42fd681bd81e6ff2c4a69b2fce0db3f9. 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/GBGLW1500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d4febad99aade6ed728b0742ee4bfa84c669b92e9065f97a493ce6809a1a78. 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/GBGLW1500142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb00d6e3d654f8379c48156f3eadc44fde2b28c57362decd326042f71353c50. 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/GBAHS1100293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff803c4368846ca6bbcdd59d38cf59d15c280aa426f5515984f38725d73078aa. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBAHS1100294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325ab4785bed7b7dba20deaaf2c5e1c658ca1790bd366956d18aca91320386ac. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/GBAHS1100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f161702ac5c44178924df7b35146278c09dab7029924abd4d81f61db30f24. 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/GBAHS1100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f98fbf7b98811ab4e107235535dde1b2fc29b93bb9d0c914b01b7ccd756ac3. 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/GBAHS1100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325ab4785bed7b7dba20deaaf2c5e1c658ca1790bd366956d18aca91320386ac. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBAHS1100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f98fbf7b98811ab4e107235535dde1b2fc29b93bb9d0c914b01b7ccd756ac3. 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/GBAHS1100131.