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 0x60f5070961d8f4d45b6e5e6d76e60aff1e1067f889a08be2f9a3f7aff96f3ac9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d289f36a-f177-48d0-b756-e76f053d3be6.json and https://artists.proofprofile.net/proofs/artist/d289f36a-f177-48d0-b756-e76f053d3be6.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 0x7424bb5476704446dd38e94574752e81d8f03df5cd5a3ee960ddb972924f08dc. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q52001064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fa61a414c358f742c73cc3d6a1398a294ae7a540878457b1e4a39ed2eb512c. 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/SE5Q52001568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffceef42860f35c7d59fd3fa1edc114d506b0db94567fd4fa715a9af345525f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5Q52003601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f62861b1bbc2e1ac4c1a76538bd2486a7ebd70ee848f8fb1caa986f79c3ffb5. 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/SE5Q52103914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24cfc6119b967ee32fb61f45a7a9b40f7d1274122f83be1ea9d4bd3acc2fb70. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:53Z), 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/SE5Q52104146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8e563591205c662e60884a030fa5dc9d79d46e8f02a784652848618b330955. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5Q52200974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da4e481a4724a157f1fc449d03902f6b05cfcd4474c58410fc8527c737d2183. 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/SE5Q52201805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d66c096a388267e5117c62b94f667850b989382e85c74aa8f753842656f1c6c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE5Q52201991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be23a7661562434c4c9fb8495cd2936aad0f562f75686755d5dbcdb9efec9a0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE5Q52202125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080405a22cf8ea04ec00baa36d56024225b408c8bd8d62a89655ecea50d37857. 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/SE5Q52202599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f8b7d73e896b2a21659f10d3067a79091f8287e5c8bbdcef3c52e264cfe400. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SE5Q52203894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9347588d0d1e3ad41264baf1776d108cc85186b51e6fee806e543f7fb14ccc36. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE5Q52302015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437566973ff2b412665effeab809f86c9eef62c73aa7e041379aaa1fc568ef37. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5Q52304630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f6d1e48cad1df4de715e767c9d9caf5040be759865e87d5d154821ff9e2831. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5Q52304632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e133a28b0b4cd76be5fcbd01e1535d1cdc0d40c25c1ec3072aa62fdab78e4be. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE5Q52304631.
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 0x056ef11d457637a09ec8a0d07994863a976ac2a580fe78daae465009f97afab4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE5Q52304844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d6f75e6106fbbd229e50cc79b929e7428c47a5abbfcd7a67bf778b674ad874. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SE5Q52304843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa58427cf7f970d7b062da1d5eeed34f74362c7083dd700d34f12d637091e380. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:52Z), 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/SE5Q52400731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1950f6c32bf5c05002e1d7b2c8dcf76fd6e4bd097cac2669ed962b14a292981a. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/SE5Q52400732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624708d86f4846cf1261ef50af8aae14524a9857b23fd776adbcbfa9a2651e62. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SE5Q52402109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396fd7bb557c60846f566aafdab814be9c7fd9058f5a815a0ff16cf0118084aa. 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/SE5Q52401341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1708acfa8b16787aefcad3aba3d9f54a405f6561c36f4f1ac2a13193c708d6. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/SE5Q52401233.