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 0x3df7987945369a144fcd1cf38056c0a57a5eb65f34d59e7ac79654b946faf0f2. 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/4b1e47b6-57a4-4f58-b347-44c57cacb956.json and https://artists.proofprofile.net/proofs/artist/4b1e47b6-57a4-4f58-b347-44c57cacb956.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 0xf21bb6ad923ef7b276c25c36f89fffa6fc0efdb6ed7a74284448585fd4feec60. 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/GB8KE2412672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493a23b261e54bb5c1b118f9be4f1bc6b7340d15da185a24b39b785bb84ca668. 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/GB8KE2412673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ca353bda4f01763bee14ecb1a877f8b52baebc5488ee8fefe827ca940e8cf7. 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/NLCK42408480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06059be3d491feadd3489b3ccc3767971d1c507b5633dbdf61967615aa0af978. 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/NLCK42403886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b5847e30dedd77ac498b00d4b2ba8eacbee8499a416d29b820aeaf08b38d77. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLCK42238164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0f3b485a690cf756333d14632bf6f075d367a3122b0f0f37c5c8e7f7b8a626. 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/QZPLR2493194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c2df68f4dd67a2b3542edfb6236aa23181c0fb3ddc0e0e96837cef9a1086be. 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/FR96X2468585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1295154d9a05a68e4ae81ac67d69ccded3484e581c99f8f6ddd5318ba693d8. 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/GB8KE2404048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603ad293a462aef9393e9a330486fcab6d0490081506c04812dba1009eea0f2f. 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/GB8KE2404049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d51d86110630ed47d790c6e1a1880bd3f43555f8823d844b7f654e2884646df. 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/NLCK42401567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f460101048994ed2f38db621725ea38c3db8684fa22d2df24db66a76744ed3. 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/QZMHK2298669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83436215fb48ecf36c508f131f8bbc54b51ce91cdd19dc96839929b6eef5e737. 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/QZTB42364415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce0d7a2bdfb2bf62e65fd6aef880fa7e654f02a0307a9a6284987d989411ebf. 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/QZNWX2327841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6f51878950d1bdc0e2af11e02751dce96b72a65b6493095e0b3dbe98440920. 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/QM42K2328778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd873d947580d08a789e90d5b8922f860967d0a6ff66fbe4382c512d7aa0d274. 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/CBB7W2311715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fb26d91b0aeaea24c55b6bd694dd8ddf26534a2b52e00920f762c40d4ff49a. 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/QZTAU2256918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feda333e4a352e4b7f110d64d39964c4385b2bf33366cf9eef5f6cc82aec878. 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/DEH742217432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e96d7ec41229309b4a22afdd110af65705c8e8f7894f06fdd6869ba828fb73. 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/GB8KE2205917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b521404391e72edd56823d4f94d38033029622ea890ad52e26976c358ca618f. 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/QZFZ42207798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a0692279347987255b2f351d997e88e4c5d8a35552d73732b3da9eba9ea446. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB8KE2158293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8109dabae8fab3028775a0ed28178fb3ebe6579cdbaeedf7937976fddbed5912. 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/CH6541652776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb855b5804b9419a510d1bf9975816d1c88c8c77fa32aeb716a85024f9a796da6. 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/CH6541652777.