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 0x5d93086be815ce9e31456b494fa97382b3802a151edd2bb8c5c35e73443635aa. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf3dc1cb-3cde-4f27-a5bd-64f84711752a.json and https://artists.proofprofile.net/proofs/artist/bf3dc1cb-3cde-4f27-a5bd-64f84711752a.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 0x67b75ad27c537163a02f8a476cf904cdef25c9c784af84fe0b3dd7cec835bf63. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBSMU3022289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3cf64d6113bd8ea4cc6d5fe78656d92c84a752ae7e61d505bf199a8142f85b. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/GBSMU3022290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797bdb4998b3fa0e871338cd76b0ed2738ae9801e6400f52be2fc01e6e2e58fd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBSMU3022291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176e538f6cbea1bc53421fcc87645ea7e8e841061b36c2a9e8b41e805ee0bc0a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBSMU3022292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bb82bc2fd2c557f1182a4786891a4a136d5c1a3f14c948a95dcfb2913d9877. 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/GBSMU3022159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e6be75c029936d5bdf98e4883a262a9c3f0e43084bf212b45cbc9eeb1bf789. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBSMU3022165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8895f3da2cc1d18ce799cf8b368bf4aea080dabbf314ade86ee193fd0e4a802. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:01:19Z), 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/GBSMU3022170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3043551bd92c068996bc462cd9b1f6f99f1f1f8b39925ac65af0b3f52412eed. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GBSMU3022408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3bb78cf491fa6edc7173013bbd1a290e645f5aa05452790fe26572090e2217. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBSMU9522608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0944fdf01c8d28fcafde99e081222b2e4bbd346e9dab425a132faf2820aab5. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GX89G2285982.