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 0x5f2c503a8e3d15c637a9226c03d8f2c8c4f327c62f9b809ecb7e4f90d30cd58c. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1262f567-066b-4da6-8483-9cd25bcda7bf.json and https://artists.proofprofile.net/proofs/artist/1262f567-066b-4da6-8483-9cd25bcda7bf.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 0xf98ca2b10a213d870095a6b2c7fd0886ce3a0ac6ae526ee7f7dcbdb40f65f47e. 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/PLC071203013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500e797ca2cfef3128a252c67922fa51fb0bfb2051e25cce61f04e3f2784caf1. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/PLA380609212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf4880bb6cca7519715dbf6088f6f79d3514924db7952ad8995048f915c620e. 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/PLA380609213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13775c5273c226fda6abd164a71aaaf96b82a895f6e490f32e2559cf80bfe54a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLA380609219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1120881d6efa0d9c4f47f7aa9e6136edc9634ffda97db1af43098512b9d4b48. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/PLA550000370.
Gnieciesz (feat. Pono, Fu, Sokół, Ward, Mieron & Jaźwa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849781170095222872f1e154bbb5e99a8f95e2aa9dc1863be673d57f58765bca. 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/PLC071405009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e46c6c532c764d1f53823694b1d1d497e7fc6d95281910a141bc1d36e689296. 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/PLA380588038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b0e7982938a7251b391f455e7fd2299872e79b81929f0d8fed67914d3ace13. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLC070902001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f70d86a4e6720f31580ef379599c994c0819c7a1c175aad77ab02b9611d7dc8. 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/PLC070902002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22fb63f76e57928262e95433ce0f8daa9f61298bb7c65cded45fc1c3b8ba12a. 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/PLC070902003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91958dc678fd0e210993c874ad70ff5cdd715184f4883ea90d06b65368bbd51. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PLC070902004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd88dc044caa17063acfef5ee68b8eacb57d49c090cdad8b5a4708e26701d3a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLC070902006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335570883e43e91718acd31f66d1d51b10f7cfb09ee997b3d53601d7a428729f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PLC070902007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4896afc19cc4d76709939084bf5845625da28f04e49896068e67df6cddf0347b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PLC070902010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601d5a8d044fd4a35a76f616c6d5daeb0ef698a3f222d7411d1d6ace83049aba. 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/PLC070902011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8acb46951d417738faca9e9d0e002e13eeb1d5c45bdd0ce6af00b847869de1. 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/PLC070902013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f949f474b94a06eabb8018cf853e237ea7ca18eaf739e4571b6320c2b5246b. 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/PLC070902014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595304dcac1f969b5448984e6fecba713bf0bf59d86121ee5b0d0e46f33a5d3e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/PLC070902016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ddbe36fff2be6643c5466e5e9a2f32478d0a51e246ad4edce3ad6de23cb5e0. 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/PLC070902017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa11bfbba63d9dde6429f45069ef9816ba0804671f132f4d1e056492626b2c80. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/PLC070902018.