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 0xd65e9361b5eff76b6a7c6b08341c5d2bced30e0fe1fe2374e68ce29a8ec57e62. Chain 2 (Bitcoin): anchored in block 953895 (2026-06-16T05:46:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fb19aee-7184-4a5e-bf03-45c8195eea2f.json and https://artists.proofprofile.net/proofs/artist/0fb19aee-7184-4a5e-bf03-45c8195eea2f.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 0x02539929062b725eebe2c42d797939a358fd55652fe5e811b2bea0f034dcd8da. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TR2500600183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e3eef3f87c4d0b45efdbba97f1e44db3278013f51e0b13da30acfbd4d10e4b. 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/TR2500600212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb155f371f116748ec1654796f7a5b06eb9f26323b457502af36fd6874d16ef. 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/TR2500600221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bc578f92163df4a8b881f2a8c62bfb3fa58b39bd4f38672032d7611f99281e. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/TR2500600211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff2e952f9506dfa3bfec2aa0d59c805b450aec4ed11aa78a234718ebc1de92c. 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/TR2500601001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50ab7b583e7f6c5c6036241f55e46dc7f43211d556bd971743c2b4fe0a50382. 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/TR2500605013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a3da6358a6604d32c8c53accb135410c0a4a27eb04fa71ca97606f92b24178. 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/TR2500600220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c4e3788b3bf0026f7cf297e07c7cb650a586b9cd15c7ce0b5fc5acad357cd8. 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/QZNJX2456419.
Rhythms of Azerbaijani Dances (Traditional music of Azerbaijan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22874177211111f5a213abb33cefbda9d11dcaeefc7c7f19988a0af767eb2202. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITI401300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbe7e7a36fd6fefe815a8966e19f24fc14bd293b7653f06251e9134f78333f4. 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/ITI401300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d2ef4161d59b8483abf111f22ab021f51c3227c715ccaaf2d373616f4823e2. 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/ITI401300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3709625dd1bdf1c17bc75270ca60bf683a0269832075ee5c8e9d5a548e6f30. 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/ITI401300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43186c571499e7d113c422c759f2a39e23866566332418807e4b0095ed3af56. 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/ITI401300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b84e05c58149dc9a730ddc8cb93f98b89b8c88459ffbccff3b1d14d65f8922c. 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/ITI401300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b9084fcef1ac8917629cb40a3a922f4dcb08187c168cd7249ff3c10e700252. 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/ITI401300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d91a489cc4a218ec7f9569639665ecf7072dbecd0d86bdd0477677eb7a2b73. 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/ITI401300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff8e558973388af5841b9b6761d132c5180c1608a27b57781f977d1939ba684. 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/ITI401300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedd6de41d5efc8917705a9ba5c8319c139d9cc90619305a5a549e47f6149f0b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITI401300119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9f120eb5a2a1bf099c65f52b7116740dea5832dd1b67c70f371bd656df3c9e. 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/ITI401300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f75fd1c31612439222b5962418af3d10238681cd86bbed8108c4a32c30a0398. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ITI401300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7591d47cc7e125ec1cc6ef68b1dfb96d8c35b836a15053b26cb2ff28455c9af2. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ITI401300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87db0ab78c4b8aea108b6679acb4bd8c1e2c61f43ca0022b766b90d3e65d964c. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/ITI401300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba7151fd0494d2df564d96938707b9f1db50c0dd97068b7d633625756b358dd. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TR2500601002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881a82429f4e0f855dd2dd043f71a3e8586444da93e13e516a67fd7ec557c901. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/TR2500601009.