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 0x65a96d562e5b4772bdd2c36ed2da19a87a1c981e891ef10f62f697e55964e852. 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/136668a2-2400-4705-b5b3-406b3be4c9e7.json and https://artists.proofprofile.net/proofs/artist/136668a2-2400-4705-b5b3-406b3be4c9e7.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 0x81730329b1066224c5ae21e7da661a6a37a10a3687845c3dc2689272a3b83669. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QM4TW2245618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35458658c2adc32b4f517de70152e11109074bf2c427d5ee80f65cc686d8be0d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUA1D2284045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8989ad70c94dea8151b448b776d1870c0364b0275a79bd3baed9c7abcfe4ba18. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/RUAGT2217608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2c8e5f2cc889e10257aa571a3c039236567a0546811bd7ea7738b06e48fc29. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUA1D2338545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d915a5c8aeb461fca979c83fbc422d67b3eea7083d0038c6716a8f7319ecf93. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RUA1D2322172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb576ec1eb49dcdd53288e7f562a8a1d7a91e6c0033d025f248ade0cd42dd59d8. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/RUAGT2344932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a6ad9ff7a9c5f0a0af5fda1336f45c49d29550d50418d64271aabb46b3fe76. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/RUAGT2360347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2470ef6c2c4bcc59a781d011bf8a2bd0c9ee89a98e0d6b43e616200d960cacb. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/RUA1D2461092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff216886e710152154a651c78b7554f5611f6ff62243a91783fae7fc8b4a1d02. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/RUA1D2468748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48ae87249cb2b46a654aa08bb04f1792de63abb685427063783a74cd4bc9b97. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/RUAGT2474141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c7eacc5ec2f01c5567e3311923232a1cc6ba3ebdce026960a4166b26d4a739. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/RUAH62407274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3cbb76301d82f7bf0ac954510521207664bb207c7127c06f610a6b6eb63c90. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUA1D2570401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb76a25a86eb4cb70381aa271a4c57da2561bf0fc26894e89651e4900071e9f7. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/RUA1D2582450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48ae87249cb2b46a654aa08bb04f1792de63abb685427063783a74cd4bc9b97. 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/RUAGT2474141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d24d378c1b9899c7c668576eb325ec896ffb2e07accc1a7766c12e6db825e3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA1D2597244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c7eacc5ec2f01c5567e3311923232a1cc6ba3ebdce026960a4166b26d4a739. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/RUAH62407274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3cbb76301d82f7bf0ac954510521207664bb207c7127c06f610a6b6eb63c90. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/RUA1D2570401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb76a25a86eb4cb70381aa271a4c57da2561bf0fc26894e89651e4900071e9f7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/RUA1D2582450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a75acf731a124606493ef8cb9c8f73c4ece31ffe446363f14d986f8aa497252. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUAH62503420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b38b7ca3c29cbea0d3aec572f861acd8175e85d518882384eab13865a96388. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2464230.