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 0xeb89bad4283f5f6541baaba7a0ea3cb4e07bd347bcc483fc4e4ad74ef54ed604. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2452e4a-b3fa-4b2d-b273-fa2c0671d166.json and https://artists.proofprofile.net/proofs/artist/d2452e4a-b3fa-4b2d-b273-fa2c0671d166.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 0xf7eab92aea6bcb51a45ddf82406e0bef5ec7bd9943a04335c3fb3fa41de71157. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USA2S2123201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2018ffd4286bc33bca14c242bf49cde15838c058b4290a99322f7c37d2f63f7a. 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/USA2S2123203.
In My Father’s House (Instrumental Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95aa188a7fafbdeed57b7a8e4a82f84bff153822e4c7c947bfd7ff7e2be732f8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USA2S2123208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645a497fb00e1fe404d79ee6701277a52fd9a7d45a96eee2ec49e5a2a3d7e441. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA2S2123210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5358f4f59c38d32b25dcd657a92e925f46460cc75d3bcf214b0640795598a5. 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/CH6541889271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f52a2b6feccaced93aa0605afd43b0c38e3aea9f78acb37e6ae03c4dbc3e41b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2S2223301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510ea661a0b0fe6b8996900abf1feb44f2d1d2cf8c1e6061b46075e5bee3077c. 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/USA2S1622203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf990c0ec76eddab27d1406629a7a9dff87771d56bd6bbd12ebec34dd63172a5. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USA2S0818902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bdebde248ea86c30cea46b2f7ff6f00eb3aa4b57806beb1ee7ee41be320a70. 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/USA2S1722501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84986ed3673ca0bd15c9f8f5adfc3dfdc77a0009ef1094ed414c7518d45929ee. 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/USA2S9217207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688e5c2be390f265c1387d56ee85d800a646d30c2f950ab305d71752b2173f44. 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/USA2S0015407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61901617b73ab65ccb3d8af86eab9fd601b7eb4f09150aadf333dd46225669be. 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/USA2S9317304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aad5bc80d275164cab5b6eda24a0d21fc2f9aeb144e9a2bd394c0d64e1125df. 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/USA2S0315142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8749ca297aad3064d8b6ddef06e5c9d0090c2c71939cd96060e86cc8d22446d1. 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/USA2S0315302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00c392172d72499be74b64ac6a081fae925076caa7fe1c4a4e589c0b8e4d791. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USA2S9417401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe916c0c32c2aeba27c30a6a4daf2ac21c3abe9ce96cbc855e4e507981261b98d. 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/USA2S0115612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b99e8d2eb31d1967ab67619ab2c367c8f81746161f116e07a0ea2771085e25e. 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/USA2S0015050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fc78e2118fbd2d3b6abd2a08b32ea4e31051a8e4869c80d170984c4360c1ee. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USA2S0818908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaab64e2aa928e83673980aaf8d2846deca9941b6bcb31cd36f6bbbbcb48893e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USA2S1922803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49398bf6383899caae99d1fdd4f8acc5c65eb59bc90c97d1bb81e6a4e3c0a4db. 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/USA2S1722504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55c153dd2a5d085253045f13c6179fb8ea0ba2daf2e3b28d78a5cb6bf3d42a0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USA2S0315141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507a11f8ae98d679a5b97d4812220521b6d8def5c9fb3414ce7d0feff1b6e626. 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/USA2S9317311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e567aae5389726255b43e960092c76dcf14b32965313b31fe964f27a6eb8c85. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/USA2S0015059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d77d17d2dc7238ae72cdc3db4fe853d72a2eabee0fe5e9e4692df13a2ec2de9. 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/USA2S0118003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf88554adc63e7c97801bc4e6c26ae8a4d5b8492802189bf4b929e8c806b3974. 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/USA2S1121511.
Janet Marie Chvatal, Marc Gremm & Bruno Grassini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15ab11ab1d558b0348146c76c213c866e3df5742a7f872b70f87eb9cf45618a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM90951738.