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 0xff0563483c09b3dbbb851eafebb6d221f96f4de489cbf0acbc26bf4c90b9138f. 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/120a40b1-9144-40cc-9209-559b827c8105.json and https://artists.proofprofile.net/proofs/artist/120a40b1-9144-40cc-9209-559b827c8105.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 0x81e7e82305dd3b33c57a04654646ef24bdc6cf2c570d8329a48e768404aca7ef. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/FR0U91204762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38d7debddd2a6684b1b2117346b7a7458d68ceb7cf91dbad3e6b83677f8f3eb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR8FD1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c7fd5f9461ffa1cda430459b6ec9f5c27ae656824239987309249805a31e90. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR8FD1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9168568f1efaaae61bb61107c2f2f11ed3d3dae14d3bc7739d55bc379580b8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR8FD1700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2d791b1ada2da17b7ffcd53da52068dc5383517a2a7bd162c30e651cf6e0e8. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FR8FD1700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe3aa44bfc8a1d754d6234fee66d4ca645273494963da13fef6b86cd8044702. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR8FD1700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb5fee2268691a4bc5d070f16900cdc9e2506a0146b2a690ce8dc2281d3e818. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR8FD1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2d791b1ada2da17b7ffcd53da52068dc5383517a2a7bd162c30e651cf6e0e8. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/FR8FD1700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70682e095d4bc9b83ce24aafe65d54d45797d663c216d88af4ec42f3baddf41b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/FR8FD2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c9bd5d9f677a6b30753f58f7441bf32481b7856f607c9deb91168985ec0a5e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR8FD2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ca6e455aca560860cc7f111252438cb5461b3fb655e2cb30724c6ac75d609a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR8FD2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16c8da5452b1a93d7ce9d42f7267f9780dcdfdfc7bffc7e15f76db3873bdc4d. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/FR8FD2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616eb272013c24a6a5e44dddb2a06f832680b4416d67654810ac69f0cec199a4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FR8FD2200040.
I Wouldn't Change a Thing (Alex Finkin Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0f7e5c8349f7c330a711213c91631d25bee3cc6c79f45acb57e39a4dd95aa7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR8FD2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0096ddc129a95ff7a7f589208d43dd73dfd30717f11e3a0ab7a2d60e9c8bbc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FR8FD2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd33c754d3898451005236dd9b8cfec1db6d7c00826d74676eb54c801dbb50fa. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FR8FD2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57dae90d4bb3be4acf886ce6a6fa4e21b624884bf9622c655acc8e25bc918c9. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR8FD2400050.