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 0x57fe212c66c3f97bec64d62e19d46c86b9aac2d9923c830cce3570173501f1c0. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ed90ffb-5587-4c91-8061-a420edeb4128.json and https://artists.proofprofile.net/proofs/artist/3ed90ffb-5587-4c91-8061-a420edeb4128.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 0xe31865940374ee214cc890e403fee2410732c1020d41d7abba4555db9515b2fd. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/JPW462446641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf519566d3b5458ff83096385a0b3b8a713c9b139639c57c4e7c6218f27a9ec3. 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/JPW462446642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d33b84639114d10d4acc081d96e5977d0746441e6610e2dd29bb275faf642c. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/JPW462446643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1148918ce692b20ce47d343b7d7a91863875fc87152da2b656ba543e3c6215c1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPW462446644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec2e117b2a1dab776b0a590d31b681c342fc74ceb00ea24376da27f4d3eea31. 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/JPW462446645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21360071b447a4695e14c599faa4688cfc8b507c2b181340012564fd2a97e8a. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/JPW462446646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bc5ee29fb34b9f3b4eb608245e2ad2023aaa5bf4b9be4d04c77d7ebbea5356. 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/JPW462446647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676a38027d96bbadfc6798101e163e8fa694f827fbeb3ae46cc83d48e99bdd7c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/JPW462446648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee25093c681b3da2e1fdf8258bbbfb0ed3f4e847e145997a3ec6f83763be04e0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/JPW462446649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37de6bd178ec49b58893587ab7eb134c45b58f68007f8c05b93b41cbe487ecc2. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPW462446650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa83125ce135e5efbac251bb53cb09a3230df2d4f08d143a8ccf45f8e2b7627. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/JPW462446651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bee9f8afa4eabc9938377de8b56f341b5a136ac940477f5c872d6cb7c812cc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/JPW462446652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d2cb344502211c7faa20d02099a4681234be8e93fc2e93a0e89184b986c855. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPW462446653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81c7dd5493e0ac591b5a74561ba14bb3991103584486547c88fb25e30a9ae3b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPW462446654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a60e148efb1a502ee6718643e3732854e758c27d19b4b4dcdaada0075aee7a2. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/JPW462446655.