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 0xbfa09e90f7dfead39542aa1a08cf7283822ecac111bea45a55bdd04e8cabd98d. 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/326b17f9-f41b-432e-8ceb-fc0e7423e3e7.json and https://artists.proofprofile.net/proofs/artist/326b17f9-f41b-432e-8ceb-fc0e7423e3e7.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 0xfb0c484c46a7232ee2c4e4e1efe73855b40244c9056729bef1324e81cda543cd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IDA181408506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dde21238eb1f55dd0d2644c52b20979fd6c783adfb477c09c72a036d84c8b2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/IDA181100537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf60cb9b103cce5197b39269f65c924030e88e4a72f685d225b65e0bd55cb0fc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/IDA181100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1e789c8685cb7a3a0c3af8ac16da677072b500aaaf24aa349e2e89e9e542b8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/IDA181209804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d96b68a119e495c580cc495c89d12eac3b8a5200c86a76ca84a9cfa83651ad. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/IDA181209805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715097e903c81e48f280aa01e9e0be8c2e402804520a0557879b21c3c0d9f176. 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/IDA181101046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426eb1fdc267c6df34501dadeef8c39b529cc2460ffe6cf9c264dab8565b3bfe. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/IDA181100810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6f0474c07faa00992638c01fd09bad1555d1208d581d74d98a3b90bf1051a1. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:38:45Z), 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/FR96X1899154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa972997b0316921d9456afb64d88a1e11afe53a0953adc8857cd4b5576d19563. 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/FR96X1899163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945923b56d514f2c2d3c2f1630a66f1a52f193716a35f15541a3292bff800f9d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX452150298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901b1ebf717c20c0136c3786864bcb9e486fb25c60f0ee696862af69642e7306. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ID2DY2500254.