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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf207bf0651e52e5f98bfa040a59293237e8cb9f438671bed6a0ec8c0dd380bb1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8587833d-d943-4b5f-a34e-e3fd330f87ea.json and https://artists.proofprofile.net/proofs/artist/8587833d-d943-4b5f-a34e-e3fd330f87ea.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65722d55a7c2417d7a33b836628b811fefc9d4c9745333d4a496f24b2256375. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHCR2100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232f8147b4ae66e57717bb638dc47dc9e5bd0665e92d610159289e19c055868b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKPL2285514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923548fad1297799be0f1bed1ddc2dacb62ae8c67b2c235ec44156730aa8f924. 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/QZHCR2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31927208fa5e723682aa92034fb58c0943e88e356d903e8a9c115b181e3c14c4. 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/USL4Q2266118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353e6e2959ea58465426b9c3cb4d5b6648f576a3cdce4a14f4093ae16244fb2f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6N2329321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e554bf583f72ab46f2221eeb6c7a06d9f6e8f99f5d5c3df9324048370da19a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA5KR2350933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7700eb11204d1b1942b31c1752bad8c5d13ef812812f861d8bcc7ce6ed7ffa13. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CA5KR2407704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a6133754034fe0462539c1102cc8251ab9cc562f78533c00c30926b0c90e47. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:03:04Z), 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/CA5KR2461486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfe2b90533ae609666773086060eede7fcbfa6b8bbd3c54c5bb9cb196c2daaf. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTAT2481746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106bdb7f177996e9f38bf57ab3b611ec416b09cce308149ed894232c54d8d0a0. 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/QZHCR2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f1593902d06d1fce617e4e7aad64b40ff34da9728146554824f7e0da7cf7fb. 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/NLRD52302485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a0f351c74bb7524399fad172370d2750fa80c30906c3a6c512f47778bf42ff. 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/QZHCR2000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65722d55a7c2417d7a33b836628b811fefc9d4c9745333d4a496f24b2256375. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHCR2100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923548fad1297799be0f1bed1ddc2dacb62ae8c67b2c235ec44156730aa8f924. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZHCR2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39b756adf257b68b35e8d61123b5296340c7b8f449c1b0dc5277777a67aef72. 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/CA5KR2414356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a0f351c74bb7524399fad172370d2750fa80c30906c3a6c512f47778bf42ff. 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/QZHCR2000097.