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 0x627fecd948502d0e024cf94912b5895b56a4327078135ddd4f4463916be62aa1. 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/9ee66561-0c8a-4339-9004-d6c55f8aa093.json and https://artists.proofprofile.net/proofs/artist/9ee66561-0c8a-4339-9004-d6c55f8aa093.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 0x23b2d7054a8ffe5b99283133fc71a21b3eb1ebdf893194c0bfea73a9427a194a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAFO2111364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5ae0148d713eb369a74348c493e6ef5db3e803820334a7c1de30d87d1b1094. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAGG2289973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dae04aec036f2aa41f48ebe34ac14de82129e43a5cb6e052bc76adcfa0f24d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGG2289985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885bd69737c07712e836a063b99077484bd89843364a30f3875a78b85287a931. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGG2289964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff2cfe875e2c678e8c631845646c97b4fe39edf5733cb4ffac1affc7ee92264. 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/TCAGG2289894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397e4eeab321c375bc171f37bd02961be46c2fd73397506ff896eb07b4561f19. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAGG2289889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e80d5b7e54cc0855b22957dd81d3622d90da9567bfa814fa0dfb0e3f5ffd10. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAGG2290003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf8fc424a82208edc37164c3673f69a7091406a67e1d117f1274d7d458fd09b. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCAGG2290026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b50406ece1a8176235f9d0e1bd86ac167fec47068e6bafadea713170a34126e. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/TCAGG2290032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fb5dcc7c8ed4056555069f47393d1be9f6ef686ad6a52df2fb7f96a032a05b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/TCAGG2290055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83c0cb223d5f274579f7a9a44622e2ebf2ecedf424c841a66b2f09c9e6b48f2. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAGY2392792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd896e11d74b8bbe83a507aeb732a91a647df59eb026bb8f98ddf526928c2c4f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHQ2349351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e3fa629bf4bacc6a09d3e8f53aaa4b9b06387833fcb65883a2dd90e7e4e709. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHS2306041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0ef5275a11ab6c68dd12758d639dd66487a0c418c57f1e7329f56761c47de0. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/TCAIP2405205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2c0bbd8cd3239cd2d979e44e4d94e01acbf5b60c98ad60f861a6706b3b3607. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIR2430561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c76d0ec2e2730cfc93b90e5ece8c725cf804f7de87f60c5bbe04a365468cb91. 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/GXBDS2486149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aafa24c991cc3013bdf3468bcf31dbb3a33db1c6f8fb11f9bb156579ad06c6b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDA832404531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d96741f922671d22f59ecc8a93ed23cbe33c0fc824df1eab0f3238bfcff707. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAJL2517198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f000e74c2845d56479a37ddeb3748e7d17bd59b4b3e960f8d30c57042377266. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRX762553491.