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 0xe3aea36431b8bddf736a51c1d1c7e8ec8a62c95beffd93816e5f01e84f4e36da. 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/0f3652a5-b879-4599-98c6-956a0d7d9c30.json and https://artists.proofprofile.net/proofs/artist/0f3652a5-b879-4599-98c6-956a0d7d9c30.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 0xbb72b525a7be24eada139be66a7171b4f7c0bb2e238ae1699285cdb5706ee901. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USSM19401444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc97395639420366a672ff804c9c85317a139e34ddcb8696763be72112abb9b. 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/USSM19401446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b443770a886cc0e4214022fe0e562b70206b35ac0775e2f33ba046a287bb73. 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/USSM19401438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a4f2e69760908e64ece30906282344e99ba90b15b0610d83ce1f04fcef3dc0. 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/USSM19401431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4fbae326c586ba29015e1434e930b14f717d367c13853cdd728d8269dc1464. 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/USSM19401435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23996a0091d7acd086c65fcc8e2e79351a1fdf4a5595c8d550313fd02fed2e1d. 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/NLA509101101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a135393378715ddf9d3d4a2cb54d6ce1d55c54d2342a65f49b150ed6c8b84e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USSM19300223.
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 0x6de46eb908866125805c02f56c2d466c22abcc696401480a82566b54b834c66a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USSM11508352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa6bb57c2c8ed6b4f2cc88c55ca45fbd4cc59acdfdc7839fd6b994dd5883b4c. 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/USSM19401430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb110f28a879008c8e108d220250d2d68459baa89d26eeec3c207219357d25d. 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/USSM19401433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1627ab11b6e28794da8f75d62a42aeac862e2797e1e4f6d52320b1a860c21272. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USSM19401436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe540f43ac3ec68028b88fbfa2f956b1f80ed75dc5431407db424ba19d8cf57b4. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/USSM19401432.
Es ist ein Ros entsprungen/Det hev ei Rose sprunge - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03329a2e36f9d82040bdb623d5a4c5454438bfac2965a0fd2ac90ca1385a61b7. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USSM19401434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd911371cd66ab176f5412b031da0c37acc4551acbbb638a88863f5fbbbbff09a. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/USSM19401445.
Medley: It's Christmas Time All Over the World / Auld Lang Syne / Let It Snow! / Let There Be Peace on Earth / We Wish You a Merry Christmas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c16ffc9702e5a8247b53af1140feab9bf1f3a224f6e707186254339f70d6d09. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USSM10414477.
Un enfant de toi pour Noël / My Own Child for Christmas from You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9363e5350de3b3a3e72a22564333238fc177255e7c8fe4117481c1131315e01a. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/USSM19401437.
Stille Nacht / Silent Night / Noche de par
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707f1a05124408b54772ba14ffff32d427b54948382ce59a895bf19379d7a9fe. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USSM19400455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac3c11e6aa6666067c1f251645620920295bcceaa6c9fcd924bb8d2d5fa9f6f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLA509101104.
Rinaldo, HWV 7a / Act 2: "Lascia ch'io pianga"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac37976a4cac78aef4ef5f6cf6887e551b6849aed9fc36f0b12612cbb58563ad. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLA509101113.