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 0x2ad0cf62225d34b19162bf5cdc824d6068e280ea5eda08c08e696bf6c8c1b612. 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/1eb3c5eb-ffc0-4b08-817b-0a8d9048aa2d.json and https://artists.proofprofile.net/proofs/artist/1eb3c5eb-ffc0-4b08-817b-0a8d9048aa2d.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 0x8f376ed194540be378cd2bd988c1a44637b909c7856c4a959fff84ed1788e744. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/JPW561901223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2067f841561ac5b1bbc9557f60b7b2fd21d7d2ac7418b423fd5d342febd357. 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/JPW561901224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa140b86d9e61ac3f419d684759a9e764538b8437de3645f5401891df5c94542f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPW561901225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b8c37d2a55dd42d27bd6ece240a0f809db2c44c3e3e7904018b2c634ecfdd0. 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/JPW561901227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95caae3b6c99c1da695dcdae7a0ac68dc59d523b6d87e9a309e69b6ebce72e12. 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/JPW561901228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10d89f5e155e100b16190f4ea8654a71d34aa4bb160ea6f8fc0fc194bf1d11c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/JPW561901234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ab8e5fc0b12f29261ec44917798e965a4bc7f27f7452ad001c783c1b2bdac5. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/JPW561901241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa081a275c4463ea38b1540cf5acbc977239706054cd247178b39919bc206870a. 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/JPW561901246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1e3b31f2940c8049624ba15cdedd9ef5dace92cd6ff631f685fa49d27235e5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPW561901270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca086e05f23ab2aa20e1f7ea361ed944afab823ad45e051cf4eef7a0e7a0ff1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPW561901277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0b2828054ede435b4b87aa91365b5dac16fc5bf450fc4ca15e04b26e6817e2. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/JPW561901283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c813dbaec577b73abe2b39385d90fe4806c19826511733742ac14e262b0cdc. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPW561901288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c772b5eafc5dbcdfbe0b50d804e360d2014ac0dd26018ece4ecc08651424015. 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/JPW561901298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdb258a03c6ff48ea27f045da3227176df5dde0f6590b5391fdfc1b3d5651cb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPW561901301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5cedd2e845fdcc9483fec423087ff6dee84f9831ab09270d4277211f5c480c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPW561901305.