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 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 0x99abf9e17c422b7cfccbc99304175b5b4d5836a1d4f39184883b38814e4bdf95. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b548aaba-ebf6-4ab1-a29c-daccd213e0b2.json and https://artists.proofprofile.net/proofs/artist/b548aaba-ebf6-4ab1-a29c-daccd213e0b2.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 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 0xbcd756de0fee7b159a63f42ac738bdd1275535d0641c8abf635f9c2e5a892254. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FIFHH8000400.
Pieni kalmistosarja (Kuollut mies, ex-vainajan muistelmat, ruumishuone goodbye)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678a6867b1c7162820a488e664089aa30ecff3aa7f88ad463045c413fd9fee39. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/FIFHH8000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2876e352340c62df2359e397d6b8fa879ca0754dca8be2fc7ae517843cbff27. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FIFHH8000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e76a79721d38dd3134f036b43af4850f079762858f2b272e1f9f3557d35515c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FIFHH8000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0d294d6a7164e53f94cd2e0afd52e1ceced62f6ba3dbd62cf21e565f1c8f04. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FIUNP8000901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8f1cd4f2619fb47b4c0de7476e139a7102d50cdd92e30a1e4e9007cfb5eb13. 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/FIUNP8000902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f12fa8ac83103a0528daa8860eac0b21bf7090f59ecbd0709b3817740dd8ed. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FIUNP8000904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5056d0b73a42c29a71ce308bf4de6ff738fbeee25ac880fd037d051f5af2d737. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FIUNP8000905.
Gloria In Excelsis Deo - Kuului Laulu Enkelten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b282f978e6f3d5c4b36d7c5230386713d7974ee6629d3b7f50750df3a19e72b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FIUNP8000906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289dd042414a519083c10a07d8cd1bab1e5479e9fa66a49f093b5baf02006130. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIUNP8000909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850b0db1f64f755988cab660ff0a4f4ecb816501e0ad1b222b7de71ed56d584c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIUNP8000910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2199647b86d13c462c120e82804f09d566ffff40c949571ec6be137285ae91a5. 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/FIUNP8000912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697dbac5648c4864d88960b6a1fd5b3bc63aee8cac3913d6ba7df26ff2bd3993. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FIFHH8000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2739133493e6ab05f690cf8d39a053f5ff4b141503f907b9a6f62fce7b258458. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FIFHH8000500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ce28d4d7ab54fa5e018537b6a92d64b27d5612edefdb5a99b1cc68626aaac7. 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/FIUM71600394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e5a0bbc2c31c9c4d44946e524c3bd70ff2cfc240c3f3663df565b9fefb8fb2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FIUM71600395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c80ff29158fd647c27b9642f6f31ad2cd4553bc6fb3267ec13bf69591f9bee6. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/FIUM71600396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f3ba51e998e60209f62c964f2bdd1170e720c2b60a7e4e2377d57371aabd7d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FILKA8100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac83bf9998213611b562d61671dc5e72b9313871995884f7fea92a878cfa562. 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/FILKA8100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768625246a75f015f7c1b65a8b5c8f1f9c6917b0cf1cb87d489b7c54d206b9e9. 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/FILKA8100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9707dade7ba72ab37ddaed56bdfca285af06b84609da5e53f4afaebdcaf3c12b. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FILKA8100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416513a013d954dcf8cb0b91f077ac9573442612e038b8e8443557ed01a08aea. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FILKA8100409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77b845062edce9f7bf41a34a7b1bc232bd45b330dd4b448ca7abcc14948b803. 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/FILKA8100410.