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 0x8574f4a91de4ab57291332affc2d821c24ba77cbdfe7859ca91718ca976aee1c. 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/d05d8ef8-fade-4e43-aa88-408f7b6744ce.json and https://artists.proofprofile.net/proofs/artist/d05d8ef8-fade-4e43-aa88-408f7b6744ce.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 0x08525c6d4a09cf7ec623337ed5339bad3abadca2b9fee55ce2bb89c1ea9d329a. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAGW2309803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84a258e56947005890860553e81e59bc1bbb382c184745b0290dc8541a4e1f8. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:08:29Z), 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/TCAGX2392520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3cd4e88c19f5c6d720290ecfdbd3284dfae79d457b30116d6525e4558fba53. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:25:31Z), 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/TCAGY2377329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9ce4e1bd176ecd641ec1545a44dd7438d3ad4acd88e1ed7c99253365519afb. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAHK2304023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057dc91f1b5e42ddb30c83dd2a684a23e704dbf0757e7185d39496f5a66d4503. 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/TCAHJ2316173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260f34f140c378781a640aa18051efb30e35167838dc69b1d73f40d2dcefab88. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:22:38Z), 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/TCAHP2372617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc649afcf2e4f55884be1b6cb171b275879b946cea3bcc3827f1de7aee1c4ad. 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/TCAHW2435544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa287d6c412307a90f928adb202b3cf0236993b790491393637dc2e63722d0c5a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:47:46Z), 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/TCAIG2482185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101027a08caa8b18dcb5462f509fd1f8e8e625d6833b550a371c9a803fc91ffe. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCAII2408173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6332b5614e02d71c888e2981f69465e4dc33d20ea00de3bda84437a0e81000cf. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAIO2456895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278e3d0a716d8debb87b63db9118d07721cf05e915abf008e9606026bb9369d4. 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/TCAJG2527081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60c2b31e3b5386b405913c88ff5a7ef754d13b65cc6224ea36f591ae630d51b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJI2598308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c5c85b965991b8327d834d7aaa24a91892894ed6cb9d394deeaddcf2262817. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJJ2596958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b723f70992ff214fb79fe3f1cdb03650172a760ff2560c9a96f99a402784ee7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAJK2566112.