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 0x00099d0d2d4ef8fff52f7665be102f1714beff6a67ddbafcb178f85cebfebd6b. 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/af7ae352-cbe9-48d1-b3fa-74ea77b96f4f.json and https://artists.proofprofile.net/proofs/artist/af7ae352-cbe9-48d1-b3fa-74ea77b96f4f.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 0x906765460bab8edb074fc748d3f7001dd8dfbce980a086ffe60844b3e903d242. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLQ8D2200573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388c002f03b301d314bea6f79e713b71c600433810b30a0c1a54c01b5d187ac1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLQ8D2300638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458868c79f91bb92c1aea1249472a3bf9fd0f7a75c89d6e98edb2ee7cccbaed1. 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/NLQ8D2300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dfe93f60928cb9d285346f5912d8e4cf2b7abbe5900123d322122150fb94dd. 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/NLQ8D2300228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18c188f8d3a55c93c19718e5bad4afb907ed897ad7ec4672b7e97608741b929. 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/NLQ8D2300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66936a8fbbedd98b7884a501a8980b9ea7c1c809f75eaecaa5633dd0cf41a2f7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2201438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030105906019a902052bcfa15a8959f48111974be35e491283f5040bad67c97b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLQ8D2201390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1349ce1f6f3e820dd0f27cc3ed61d6ec00c8917403bec47badf3d0ae5db2a1d. 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/NLQ8D2201350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a91e8d11435b78ef9cc61d8a7c4fb8354f58af9894475bdb2ccee77b9bc4bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLQ8D2201282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f7d611b162edb4aa205806c539e8b84cfceba2d457e2cfa74263f08753010c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLQ8D2101621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29de7e3f376debd86008e5a41fe919dff6d1d8cf1f431e5a21e4493f0d4b986d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLQ8D2101055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ec26f48fcffb480cebfb9258dcd78d0a695c01fce2e020c076ce4ed4d4bc56. 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/NLQ8D2100704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfb6ae17ffc9d2ace9c46d61efa6f95fb9ac9fdf8f9e4585b98d2c07f087f84. 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/NLQ8D2100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956d76d0ca5433e5d8082363f9ac000bb06a4c41b5fc41775704b6757b643f37. 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/NLQ8D2102264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d51860e9cad35b797e6cae988847308990b0acacbf175520f0a1ccc0bf33992. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLQ8D2102267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ea2ee4c2570210541098daad7003ae043f88952115d558b1090c9e30bb364b. 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/NLQ8D2102274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eb6036b5d7729a225c9a205e9eb047c1131d9bce42c93586dba4a857db56bd. 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/NLQ8D2102276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a998fedc5191f505b66ac2eef129b0df22b3581e356f73ef1569d667a9cf88f. 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/NLQ8D2400748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634bd376c7c870c44f5589d531206c63c584b1e92851ef648b2838f06402a741. 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/NLQ8D2400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fa73b778ea03490c4b186d1cd0dd91749eb718b475822548971fc8560910da. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2400354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61103e8ff48b8cb5b8a6794ae0534009c030d4c1374e81ae89c9f08dcdd0c56. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLQ8D2100754.