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 0xc8bba6c01f79cd1f9ee9ed80ea55affb02c0091e76c48d3475b1658d60beecb6. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2b3bae3-57c7-4882-bc55-5124d36357cb.json and https://artists.proofprofile.net/proofs/artist/c2b3bae3-57c7-4882-bc55-5124d36357cb.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 0xee9bc6806ef84ba65074074611d43b72db344f0314afc43f1d4a3e98257fa45a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNFJ2306838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e1973ae2aab2515fd831bae9a1e86f346c329772b433ff590b42153c5ab7f1. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZNFJ2306841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773bfcc7e7952d7df8c84b10568e61dce263224f9f54a88da23745dceaea497f. 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/QZNFJ2306837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa527c23e00cf0920e48027569915a8ea88b4a7721c9d91907555e3d251d6c1a7. 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/QZNFJ2306836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cb534fddc543900c4177dd4eb46b66dbc8322ad7dacdbb612ead022fbb2a40. 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/QZNFJ2306840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab547df626eb4fbbd842036a931ed54af81427df94c8d929d43f7f7c6d1f95c. 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/QZNFJ2306839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b033ecb299586802294dad29566d17735abc27540e785b49b964cbd06bf3ec. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZNFJ2306842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71811386f58397f00c5902e8e6aa536286337fc1f4f6b41499d7093cb0e8918. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZNFJ2306843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431cfe2a45fdced71711cbfb45858759816c98fe08479bde9810b8b52419297b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNFJ2306844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400b7988eefd73fc46b40f326c2f41e97d8e6b010ae668d399607a146e88a775. 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/QZNFJ2306846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb27f31448eaea081149f8b256c34c0cd2625d975436e196584ddcdac0e2c351. 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/QZNFJ2306847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878080c9fd4b018e99836bd9c4eedd9511b0190d1ea27667774434085f6d0a52. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNFJ2306848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3393100d6d0f3ce153097ddf40a1c2624772d7502849b821fd7aec6d49384b7e. 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/QZNFJ2306849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf4da9ea051533e91659c430e39711f57879f5e19e8e7dfc028f7021684d0af. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZNFJ2306850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5f0e6700c5393ee98bbc592068b1a8a9b7d901309defb638674d014f870a5d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNFJ2306851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b31ee13a11ad7272625c5b00ed1de096fea8971f35511f42eee0b3cc2f9354. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNFJ2306852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037d33e684a124626ec1343754544ddca431597e7c3bc6b097dfc018c3c59ff8. 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/QZNFJ2306853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78019940c5f2e75f5c218f2efd7b2eae7a6cf02ce8b6ffbda335475b00053015. 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/QZNFJ2306854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fbc9f5afc8e778cb4693e96e06d6021f46024399308162a4d8df2ba8d96087. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZNFJ2306845.