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 0xa85593ae63caeac3339885c089a592c37df91fc37c5935218b65672ff0baa658. 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/6038a228-d0c8-4679-8f1e-721449bcf780.json and https://artists.proofprofile.net/proofs/artist/6038a228-d0c8-4679-8f1e-721449bcf780.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 0x97e33a44f0abda392dad1e95e0d1997fe3850b0f0b8cbab0e7569f58ccc8437b. 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/QZES62293951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f22c6a90227308ad886c057176930bb687abfcbf36f27c142871eb513a9c17c. 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/QZPLR2117958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb997fd870f127cd0cec3f0d689f51c030f9968d688822298860524ad9f087e68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2493744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e52bb3400853390a1e058b6a0b965cc8ebc3a540aa99e5fc2142dbf1aa9cfb. 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/ES64E2451698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3049e6e2039a4a364f1e7451c125962e095c28f12b8db9ed4d243a1ee8809d36. 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/ES5052300733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9562f143631fce85cb94dc93ca80dec1ebfcf2bce4d4b3dffa09e24f49b4ad44. 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/ES5052300396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303c39b95c95938146a903573ff2028c6426034a6a85ab8749d98894a5370daa. 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/ES5052300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87285d1038f83b37309da2830ade4c59e248d4efe0dc8ebd9f1b5d958d21f61. 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/ES64E2301286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e53dc992c2fc15cbc05c0680324011f043c9766e271ba4d9825d82cf94243b5. 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/ES64E2202542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f4ee3d0e76c5205d239745d9437b2606a31653414b482dede0059e4c5e3548. 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/ES71G2216900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e3f1f52eb00d96c621c7bf25d8870a1b995682cc32e3816b24af564f0d1729. 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/ES64E2201708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184deb0975f8a83d80e5b8ac474361c455bf0efcff22563df59213274fae33a0. 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/ES65E2200553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14e48c0f79904bcedb26b6f510219271330c924b87950cfde30df1d28e88d00. 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/QZDA72274936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f4b8d02c52f2568480ef202a572a3ccd79bcfc97d369d4bdcca9bbe0969e69. 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/QZDA52275456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f1b1c574f1bf9db6ebb901360d8a2564ba93e2f12a5b0df7b50c88138fd26b. 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/QM4TW2266658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b0009649c80d69bfde1934924a6c94eb1bfc9b06a6533707d3351943b07d7b. 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/QZFYZ2256591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0536dcbd4225f86f1bfd3393d0d21329fd3806237ea0b6d0d1868313e8f44c2. 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/ES64E2486086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63e2b5f5f00e8422703b353058e849320e613bbaca8ced17de5e41c72aa3218. 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/ES71G2238261.