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 0x4cb0571dc80c19af643b3961a0fa8b236519c594b0b2a3e19a50e5a1a0313d10. 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/a441df5a-dcb3-4e9a-8eb5-c671b10b661f.json and https://artists.proofprofile.net/proofs/artist/a441df5a-dcb3-4e9a-8eb5-c671b10b661f.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 0xd06b15a3dafcc10cdcd626014b7d8060ecdf805dfc2128ee417bd3030fb23141. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/USA4N0300002.
Padre, En Tus Manos Encomiendo Mi Espíritu (Salmo 30)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5404b79fedfc05a4e2431214a0461019217d6b92a5f0668ae37911f19171730. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USA4N0300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2863f67cf5d312c27520bafc79a7476a77366f1577af9fe694f72f69498b362d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA4N0300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa048b061510c7d7374d827f98e4a733e655dc6da220473b6f0bca6f05f40883e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USA4N0300014.
Ubi Caritas/Where Charity is Dwelling/Donde Hay Caridad
Con Estas Cenizas/With Ashes and Sorrow, O Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52243ecf63666b0e68e96a0f0b0a2d7fdd4cd58f8b5306fd6d5ac1411559355f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA4N1900673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6119e508684c8829f967a42c9b7d0f4b1a09d2195767f0260a4f5b8ad88505dc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA4N1200747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720b86980ff278e973c3785a2eceb956cdc84691f9c738cad745e042b5f75394. 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/USA4N1200743.
Con Estas Cenizas, Señor/Perdona a Tu Pueblo, Señor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf649133b312f711474f1eac54abc3af85643720a9205f6c68573889fa41c49d5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA4N1200705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914163975dda9b970bc77d3b42dcdf8bba92b866741df78dbed03b60cf957987. 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/USA4N1200707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf565a1481873da681dfaa68c52da8b66b2f53adc29749b911c3d3d703c570733. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA4N1200704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc00ec0a81fe896e47b83f38824df930b80948afb51f96789d5b54f69cd20f4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA4N1200715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ed1badc1627e65dd930f40c2506120a1b211b8fd6144ffa088dc703d7c4174. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA4N1200711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575a0085fab912aec1f6aca7297e7b0e493c3c4bf7708234f65b44e879118ab0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USA4N1200709.
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
Salmo 109: Tú Eres Sacerdote para Siempre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d1c2a997bc8017b6545d7d8f2f7734a25a0be4273f3d21642f1d33d436053e. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USA4N1200809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61682f5bfa78044dd5af14ca2aad35516b44bb86e2044408af1de86e8a8ef9bc. 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/USA4N1200815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70df9c86579449f1becce0243f92b422b81282c3abd3f9c653b3b0390e56c69d. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USA4N1200805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7295f2e3c37e289c52cd9a9456d2ca2576ea8da7ec792fee415bf01b3eedb4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USA4N1200810.
Sal de la Tierra: 50 Cantos Contemporáneos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670fbc76079b677f148ebb3fcaa8bdd4a3a80a118daa21775e104ff70bd4440c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USA4N0600214.
Ven, Espíritu Santo (Secuencia de Pentecostés)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137d2e9a3b0f865355aded7c1fdf9ba964d4456fd467daa1fe7a6ff914671137. 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/USA4N1200712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7399da7b7326d7d4103db967b580ccd3e79b53d5453551105cf56702c2a26c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USA4N1200686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0292293dc1b85c2f6f7642d5d6277eaa292582e9d1ad2f2592bf13af0f6a132e. 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/USA4N1200706.