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 0x909c83a56a31c8a9a7e5305b1866b77477d89265a45b7fb6e18acced5114bb8c. 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/3082c3a9-a3ac-43ff-a4c6-8043b78749c0.json and https://artists.proofprofile.net/proofs/artist/3082c3a9-a3ac-43ff-a4c6-8043b78749c0.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 0xf12470812d9c152696be99c42f37de23f09555e12ce15147ebcae02767c09c89. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:03:23Z), 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/DELJ81877968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9710de2c5c0ec36ba2228a86cfebe50d65e340e3d59943ad9385d9a06f87d495. 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/DELJ81877969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe402159523e5b95f16db1e31a5476cf4356c4d7297eeb85da9e24dd072d4c69e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/DELJ81877975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceefe731f97420fef4fcbc8aca3cbfba4f5a5f9bded8d4be7b4e745e12ac179. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:09:55Z), 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/DELJ81877979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9676d03604d73a9fc611cde1133f2fa5cc997f963b69ef687d9c105d183c93e1. 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/DELJ81877980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1102cc01de328dd4d02af82ff176660279fa47830cf91b9a67881453c765f42. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USJ3V2044131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe997dff4d552fc528f30245e0f3f83d1ffac2cea9396987442a575378e5dbea. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHNB2380160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe445cb994fd9d5e586ca732bb2c301968afff00b81b186275d6d2e4424d5b4b8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNB2380165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b73ad4a749dc2d59ac25d4d463d948d79e8d593357b27acb4ef40172d3e357. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHNB2380161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa13c70008af6c3cae6b444b45c31f9446b25ee7735c201eac44376167ac5e92. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHNB2380163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f68b9c8df5104c2c52b73707fe51e1d4f003d2a7f931c0ad9aa18509b5f18ab. 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/QZHNB2380168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b60164e0f3ab418485ab2d1ca893c8eb286ec6721078c18b9157b8ea54e11f5. 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/QZHNB2380167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86af0037c184e739bf9e89cb5baa4b582c2770757e3e3370317635dd8c21408a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZHNB2380157.
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 0x4c78c667f0457b952938f1b05d0cc11c750ecaf72548ad2d28caaaf2a0b73a26. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZHNB2380159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4a39b45abc924e3142dcea828dc30e0f68b9732df625a43f3513cfb2cd7d21. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZHNB2380162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaeb7a1fc6cdf3db3c2c4fcd49c6715a5fcb98978404cec1d627dfa04a7c6fad. 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/QZHNB2380158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf2fc5259b87cb9772961d937eeb8f393d3b1dd8e7cf7ead2cd1d4b0ce05e93. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHNB2380164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9757f794579d88a776f76f5e5274790e111ee62eec1ccf6ab431f79b51c4032. 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/QZHNB2380166.
Niggun Shalsheles (feat. Dudi Kalish & The Yedidim Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c613a99e6855239fa102ab39f832e09dbc8ab47ab23745d87ae1dec605b3a7. 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/USHM91397853.