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 0x125a01c53d47ecca02565746771f4c36cfc4ec0f7a995e0f52eb40d6211691f7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cfba9e3-66d1-4d2f-a870-be3736c35286.json and https://artists.proofprofile.net/proofs/artist/8cfba9e3-66d1-4d2f-a870-be3736c35286.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 0x530fd8b06d48adf26054ebe81b9275c900b94b44308fd5e780f3936914143cb3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEAR42470623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcf040d7f323030d95c29a420cae5c7eae87a961213396f8169b0099654e83f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEAR42470937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700106146cb74abbf954be16a653f839cbc01fe2d519bbdeaf483e73b5c04a91. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEAR42470679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b14a72835c9104af052290ca63beac7d47c687f39ea01d9c6443bbad0996af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEAR42472033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8d68cecf55fe5a2d262be0425fe5ecd5bc38b6cb51dc308a61848c498dc072. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEAR42471132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743c9946dd5ba687ca7cea1bb9bfdf0fbd27353cb9dbbe707b0bb0e9669ce539. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEAR42470901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0988ba19fbae3d8ba77195ff94d67a40c27f09ae03314139aa30552fd884c1. 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/DEAR42470872.
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 0x5d4f15b9de2440e3a89500e02f0afccc216c1f62f59c59be1e7b784d442bfda2. 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/DEAR42470608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0bc56b91e49ddb5f90f737239028cbb94190413d20de8b7152fa7f5f1e5288. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEAR42471054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd298cfa03aeb08496a6728c4332b0f257df60728eed125bded67f01bb8881a6c. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEAR42471099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389ddd1e22d6ded69e57b24f4822bf8abf87762f57292d0c2e91f861a5e6885f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEAR42470951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99cb47ba11c4416022dd437de71f2a9e7ce830cd7729f86b825e6300ab814db. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/DEAR42470691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb9851a9ebf6051a0ac68d8f5212dc832895e27e7289fd4d7688508168db0d3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:40:48Z), 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/QZWDW2528153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc06bd4c4fd4f89156e360ee541c63b07ffb1b23a94eb40e675d3daee8fe19e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWDW2528155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe168db9378219e8a500f7d4b073d4cde7bbed39e23235d28054e56a866ebd36b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZB80H2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1bcd90a64e07b893e3af782b72b61c75f0da7d976f208c5f4638d4efff1fb3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAH961166003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcd5dc57c87d2fb279606a8ac5da2e9c3b612cf79fd6357ad47afc1382858db. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GX3GJ2100100.