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 0x59e24dcdd1688d7d754b1e436ecd781231c430ef681a6b4db8847d2464284eab. 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/c8af6bc9-7938-4cdc-a901-249127ba51ed.json and https://artists.proofprofile.net/proofs/artist/c8af6bc9-7938-4cdc-a901-249127ba51ed.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 0xc95fee0bdd2be567e0b48294f5af6c857495e9b77a919a93477a6332712c3249. 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/IDA661700496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bea60e12120a8a84aa1845bb93f964d451b5fe4625ab8cd64b1516ab78b8757. 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/IDA661700497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1851ec0e7dc241a1f8a772b0fc0b8a9f487232028ba25cbb44e102abc9d982. 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/IDA661700499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781e6110d8d93b074d762bea20cc85027469c45212d22adfeede81d66a0e5621. 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/IDA661700500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad89125b9d0afe4fbf46fa07619a5f15963ccd2f1721b3a148853a0669a1d65a. 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/IDA661700501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa1889294538a8c7ccf393bcb9a60adf46b39f77b2de6f2815b741551b96296. 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/IDA661700502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6307ff3b24d03ef458cdbd97a05ff4369aa2feaeba26d84c368936aa599379. 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/IDA661700503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d35f66f159c741434685c5f26418897ef956a607d344f16aec4bdbc1365b4b. 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/IDA661700504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42485bffbfead9ec00ca99199d1cb4295b342e8c4de5d56e99d2b8f15b4ef4a5. 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/IDA661700505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c2c1ab51870ae01972a6ac90ad6e76997565c1786523bf8a8d416d78d8ca22. 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/IDA661700506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edc1c1666c2112c31ecb69ff494d9a554f7e9327412467a714fcd80d9cddadc. 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/IDA141503979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89144755e20622e5b2eb1e5b172d882dfb5cfdb683dd0741b15c65fad040b1e. 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/IDA141503980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bce3a1f08410ab92015d7d363f0dbbccdfd7b5737bb873a43fc5cf44e05c1c. 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/IDA141503984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88999b952b04d4a8db50329732b1ae6165834b72ca9d9145d88262cd7181edbe. 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/IDA662001099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa389930a391783c80a9981cbf79ef340baeacd8f40e880adddae5dc7e05fbc1b. 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/IDA662001100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e47d559d015cd3606ddfc430d284c6e55daf19553b172984d249583886bee8. 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/IDA662001103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63a3299aa20a0aae086651183b16589b42636ba490583a408e38071bd6b8444. 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/IDA662001104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cfe9d42650d785ea01714e5b073f5f6717ff4ebe919d335f3fcfdae86b09d8. 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/IDA662001105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe531a514c1622b9cb67605aa3a39a9c118c8058cb0e4de5674eec12848998332. 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/IDA662001107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd5c9025cf777ab1dbbf010cc3010fd953f8f17061fc97604dd3753bb1cbadb. 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/USUYG1315986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd38d7a1813027d45aaa42503202db38a1e1b2562b66647f8d29fd672992547. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USUYG1315981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cd32fa504fefae4848d8715a5eb95adb9d2ca67ddfacac2f59f548e3ddf35e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUYG1315984.