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 0xac01fdf94a5e7ae2fab01dd05ee214da9d7cb2a58e6675d572a74818c201685f. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e8618bb-095d-4f7d-a226-b75bc75e4d4a.json and https://artists.proofprofile.net/proofs/artist/5e8618bb-095d-4f7d-a226-b75bc75e4d4a.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 0x65845d19cfed123e63a198d94b4ff96a21eec9f2b33dc6dfb9c81b3852f081ad. 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/GX89G2226808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc651dfd0e480a381b175f7224fa75c0d7bca1e9e423ea78cb65c8787a87dcfc6. 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/GX89G2226810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc0ef8cd8dfab2a1c514368a2f5fcfd25e8542ede3c7162592aee56940ab4cd. 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/GX89G2226811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c9a2bf3faa4c10c57ff68394128921059d60e0297d9700f302dd668fbfd8ae. 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/GX89G2226813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f16e3c7a40ea5914a9a0604ec3623a26c3c704fc865973ffcc7d7c35887760. 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/GX89G2226682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b94ad30910934711e74328726cf5fa8dfffe704f4aed63237657b4b5f443fa0. 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/GX89G2226688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b21c5f186b007a01de8747479892969c2b84f4217ea882ba0e722b765b4015. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GX89G2226697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1ea60fd0d98bdec5cc0b50de0db12610648bb62807459ece94bfb26ea86483. 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/GX89G2226788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e2389d6c3ad5a67236ac830c227122209dbd2e003deb0076151daa4f40c59f. 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/GX89G2270708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fc9c739d97935a4c8cc03b5adc6535dbd638d820a84a013ec6f78a87f43a38. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:36:43Z), 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/GX89G2270710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699f78c1d53873ef2e9fd3fb7369e92c43435dfdeaecb889756872b8c458e968. 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/GX89G2270711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd4f99cc5743b845c21f521716096e3d74943eec23d34caacc574cf2b89bb40. 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/GX89G2270712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a6d9bcd23e75d896c7ca58cd729a733c7b56410de9bead24c5d74cfd710454. 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/GX89G2270716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3468efcab9a2a0f9c8ad1139fff61c6f43457cb23dd576c8d3b3de9407b4e75. 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/GX89G2270721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072a29ceb8b4ada0d412bb70cc1b60ee57ecdf9c24ecc94ee69efadf6262e9eb. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:08:50Z), 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/GX89G2270726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd835ca754adb9be4ea80204668c93d79df427a0ccbebff280ace749fd50c6f. 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/GX89G2289752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e24453c41ae47d6d8f4adfaeecff3a70a98985587ebdf93f7bcc714ce1b3ba. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX89G2289819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdba6d8a25cf2c6273155ee954b25638f85f92a48a71fc809fc132774a6549f2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX89G2288519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef3923aa7b48d86e88a3e24685883c95b54ca5523a20d670f0cb3211296007b. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/GX89G2289924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a4ff3f75d6b21b8d975a6b3c60d075e56c52964bd427e3ffa643e5a57920bf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GX89G2289947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ce21dd8dfc5ee4332a4c3343f87e8f2b409158027726b47f9f3d4229e4a786. 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/GX89G2289953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8d55e68823fc1ca4fa1a8642b9797280c1c3674d83283b06da38140ef15a79. 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/GX89G2289962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a74344197debbe9ee2460fa5ea587ad9b6f8fa68e412f60606dcc52077f4d47. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GX89G2289972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8829137133edc74466953632d01e4d7e8e9df43483429987ef272375d4aa0d. 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/GX89G2289975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e16bc94e4350bdaf686b0523da24b00ecc8f16e0201c8899450ba495b189887. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:39:34Z), 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/GX89G2290004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7588b21b48e203393c233b85a0a1cdc1a3852c4baae4bda4169dccda1eb994. 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/GX89G2290011.