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 0xa3bbf3d7f5deea7d926abc4c3a279482f4c7ea719148871ea9bb09a7c5b6518b. 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/4881247d-1645-4417-9a69-002ab242c412.json and https://artists.proofprofile.net/proofs/artist/4881247d-1645-4417-9a69-002ab242c412.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 0xcf15f2452d823ac04e90e91b76e0a53698ee7c5dde117cac2585357a66b41658. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AEA0D2118602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff0849de12f9de6e40b751b0cd970f612b6843625aacc5d8d448ea93fde6df0. 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/AEA0D2118603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f76a367210068f7f52133685a3bb0a42dedb79a0a3643e07aee235282b6cb26. 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/AEA2L2309992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478b9178c02d5b366e7de8b0850fc344c3cdf7f422f6b03bacfc4513109582e1. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/FRX872467160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1393c9546883d775248bc1d3a5a5673f740122bceb39682bad2d47453d531439. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DGA072406455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728fea40a69764b9e54495ca65ebf53019d6994a42ba0543b80ed4880854549b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:48Z), 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/DGA0M2426808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c72ad560c96d7c064175d7a1af53f57e64750c84e9aea0bb999be49f179b3a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DGA0H2425547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c8ac1999549264cd92a0c8672100144890caad4aaf9f70fd101bf0382c8143. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA0L2413560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee1bcb9512c48e17286d84888806edfba39e5c6ab23ce0b623c6db556a23e32. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DGA0R2417798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d01f114016baa71e3c06b807249c6f4f5c295abcf074780a98937014d77c39. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/DGA0T2404320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd430ee355276837eccc167c2c7cfe22bba49c68a476c0ba28c07ef69c88ae4f5. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR10S2592237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ec3f79b22d389074ce16e5a8ca5878193e3a3ced3492067d78458ec3584434. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR2X42564668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0962639619c1bb5263dba040dac93edafef738e2cd02fb673a647fc7abc9028. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/FR59R2567241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71de30233149a6c380b37f04941d70a30934c2a1a44a04bbd1f4d108f3ef2075. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:36:12Z), 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/FRX202506067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62814b01ce6f79c70430a18e8f3ac6526b5b80282b2c1c4ccf36f786d443760d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:50Z), 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/FRX452501296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6996af52f04e61903d22c126493c9fba80a654613ef8ea54694d148dc3f0bc32. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FRX452582525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece9fc4e7b108e3a327ca7c291e39dd5a0168ab65b89f36ae6b7fb3118c2d0f6. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX872513706.