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 0x08ccb6a4918759ec37b097c852e3c214191609cba2c51c5acbf47bc0430e1ebe. 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/e4458663-7bf6-4d51-b208-ab5e84821dc6.json and https://artists.proofprofile.net/proofs/artist/e4458663-7bf6-4d51-b208-ab5e84821dc6.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 0x398142f22ff5cf9861b9a9d9f8479714e3677727a3ac30583f3bcb1703231a38. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:42:47Z), 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/HKG732257377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e90fd1a5e6db5d7fc290457fdbcd986d09efef7aaae3ff740640a7ae9557791. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:32Z), 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/HKG732257381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8efab9449da01b3f352da46fcd558905c2b567a4987b7c14061b4c97f93e5a. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:55:35Z), 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/HKG732258007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d10df5dd19f2ef8bbb5898bc62dc33aebd44bd012b4da81bff605dde309ee21. 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/HKG732258009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f5810706a4c53060b1429a622375aa2cd2d33b26b0f0f91ff33d30c25168dc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HKG732258010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9d7ba09d6dc153f944293e0aa86d38dc3e4b0d45613187ad7c91163db391c6. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/HKG732258013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84f26f87814de9c4488b17ffa2c4bec15094664abf33a8f0075d8746b53ff2e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/HKG732257364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ed1a83b76f6a29bab82c976506bb9b9722fa74afeabaf090e2cab274303077. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:40:42Z), 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/HKG732257365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e26811aafe2e46b0164c4f1619b31a55c77d5e6322d1c35b9c32dfc0f77d47. 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/HKG732257366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213e44f69e80819822b1f6bc5e60ae24e257e58f75d1083c0ae575f6377312ea. 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/HKG732257370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064210ad3b8ee9b3dc674c42b4ffde71722687ad81d4f1566298e9e4a09764e0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/HKG732257372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906924840fa61995a8c30f2a287b6ec73f61d6b65666132e06069263579d29c9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:28:39Z), 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/HKG732257375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe367245b5f7185b7a41168c00de240eb77c911121ee2fb1433f942c34fbb1c6b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/HKD012611264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d06f2aeb49fbd0aa7de41b8ddc25edb0d88f047128c1f747ef2cb0324c030b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNZ221700275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d48dec7b8dbfbc7182ae70b564a6c88a937622670f57c295dd3fb5b1b0d9f09. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/HKG731400568.
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