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 0x81ddb5d7bcf37ceea1b2f67d18028bf59240095977a637815171e96750986c36. 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/f752be68-5161-4dcd-a521-9fb1751fb9cc.json and https://artists.proofprofile.net/proofs/artist/f752be68-5161-4dcd-a521-9fb1751fb9cc.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 0x0ccea426f0694b4954e87b33fdc43c83f0a2418ccf4ea9aaad9a01f19ee10362. 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/MYBK11900138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5ca0ee1b269f3c8d6ebbf304bdfe0c183d2ea76a08866a3e71c81eb622145c. 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/MYBK11900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d8ed4dd3326885778b3001bcf59b20746a725f49dab67ed6fe5413c0512f06. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/MYBK11900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bca215344c9bff1dc52eb050eeffa83429d6c9cd2a234360a3bacae8a5e5cfc. 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/MYBK11900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fedd615fc8b5fa9402e7a9105edc685bdc1e290bc7567879f8a08c3961ee9c. 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/MYBK11900132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a57d03f26bbbad2f1e3d7ccb900bedb0c53cda79222b4e93c1ab4baaf9bc26d. 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/MYBK11300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff07cc3fd75555f96230aa53af53863cc2bed91a1456f7d5dae3acf4374c3dcd. 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/MYBK11300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2066db33fbe4ecc1767ad12d581bb59bc978d345d3f66ed09179cb3c1bbfbed. 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/MYBK11900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ad671b35c7a56a08b0e8c13ea1e742f637dcce7687f98a74fb94395e698648. 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/MYA112200348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3761ffc080d828e168e19f43b846b7f9e44d83a6aeee84b36fdbf26cb1fc88. 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/FR10S2275330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fc135a7532e12eaf4123d153f23df664bd0ae5a6d760a004326b18f5a48e7c. 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/QZMHK2070911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a6fc52e8842235241732c91b01ac70ab87be7534e9553e681e82aa1925aee0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MYBK12000171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43edf4742084f8bcd60c03a3099452dcef2c3d1033ff1a357177b51f7723f5aa. 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/MYBK12000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fedd615fc8b5fa9402e7a9105edc685bdc1e290bc7567879f8a08c3961ee9c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/MYBK11900132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a57d03f26bbbad2f1e3d7ccb900bedb0c53cda79222b4e93c1ab4baaf9bc26d. 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/MYBK11300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2fcfd12f6445149ff3288235ab3b13b6289752ccf6923c3e34359d6e61ddde. 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/MYBK11300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d00bb6f558ce7a063e06ee912b3e62706a1438b359cd084aa9a4a3944b6935. 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/MYBK11300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff07cc3fd75555f96230aa53af53863cc2bed91a1456f7d5dae3acf4374c3dcd. 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/MYBK11300111.