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 0x41bbeab7961c057d9f10b7b9bc9591c80afd15f1686ec8d972a91c7f7e389f6a. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/305ba3da-d828-4a31-8d82-9288507aba0c.json and https://artists.proofprofile.net/proofs/artist/305ba3da-d828-4a31-8d82-9288507aba0c.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 0xeea39d6157bf140b263359df5fc742e8d0a2ac15395bcde5d353dde96ac6b51f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES71G1933023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030a94db802e8550edad8b591a053515fb8b8f1a4ea5f8052505055d0b887eaf. 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/ES71G1933025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15a7b4bd1724f5d49fb3ab5e0976c4bfdff608db4cde375f202a7f7ed7306d7. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ES71G1933024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3156e751ae701c11bd71c3d17c8acef041122d15b07dde96351f9de9568b6f74. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/ES71G1933034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cf06016813ee3fc0fd41ece0f8d1de43f566a32d1b19b074352c373bee96b4. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ES71G1933026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf383bf3199a1ba8e471e690c7d8612a50004ed151be0e6c358361edf245b4c8f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES71G1933028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee1504235d40fb306ddf2c3552bd7ea6b75c01a3ab051eefc34a88c38af78e6. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/ES71G1933029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33383a8eac557b71fdb8dbe658f0ad37cb017d1a4495ccecb22e7db04103d9c6. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ES71G1933030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad56608fe15be83d5bd464ef2c1a8fc6cc482390ae23f32e4c2f22f1a28bfdf. 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/ES71G1942542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a2f75668b9b6202274d9ee71f57fc5e643d734a92962708636fb3a4c5d61c5. 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/ES71G1942535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8be7062a88f8bf502d37c4297113eec1cefc46b152f187159181811008156fa. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/ES71G1942536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffbaa503d33791a59ff91985d20a0d8aa7791deafb6a585a5c8e0e9eb53d982. 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/ES71G1942539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b240d6923f9e23affa7506c3119d6d1f5da106d42c032884799484bc10af4bb. 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/ES71G1942541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47a0145f09ff1558fe87227b7175830ba79614c04d991476bf5fb23558361bd. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/ES71G1942538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e8e844906c0a2828c7c6132cf03d9a07f5f6c6c88c925c8b4c64922d3398ef. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/ES71G1942543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9d839304a9bf614ca679b4b83498cede40540af8e5d73fe313001827304c82. 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/ES71G1942540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624501f37cc80a40e49ce5e6ab6af7c7e7c9820098b6c8ad2d0b8e423caf1ca0. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/ES71G1942544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d25548408e83067e0392c53f516459e97f14c93a75c4c49267945524297ebb. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/ES71G1942537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e9a8a3a288c7ca6ea0526195c91e271ad6db84efef0931118c63ac522f5997. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G2106139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cd6ebae6e8e24c48cb87c256b99572b2bd0f68fe45063bffff635659f0eefe. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES71G2106151.
Historia Sonora De La Música Popular De Chile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29f40b853e706d44328a3a7fcfa472e1d4c207f08b4c7cfead01fb793171469. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CLLH22602718.