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 0x8b51011514371990f88a6e6880205336866faf38f07957bcad46b0cb281a98fd. 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/eede50f8-0bf2-43aa-8526-8143db34ba05.json and https://artists.proofprofile.net/proofs/artist/eede50f8-0bf2-43aa-8526-8143db34ba05.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 0xff0d67a7a2f5e4bc553be48048ade3b8b9167426b36a654917ee8ac287333127. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ITS781901174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37f36d8465445df212753f910bad0f3c192ba4bde0f34974533dc2460fcde22. 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/ITS782200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec0a35fb4ee3c7d138290a5fc180f1585710d04f2dc40db79c174051ed687b6. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/ITS782200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4784d458098ad891bef0c382776c0e27fd17539aa677bd01be99faf2341dc8ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITS782300922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae74fd00e843e262c8f45b48cecaabcd6c8366a9760e00129f95e045ad2aed08. 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/ITS782400572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1345528480732cb6a1a6fdd27a83bf6eaa6775559c8a796036cac3a419a41e. 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/ITS782401277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43ecd6ba1d20a0277248f22010d548fc16bb61ba6352982638283f0cf95804a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ITS782401857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca48bd09cdb54cc3ee52e3af321328d184328e913c72872a372113dedecd2746. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/ITS782500468.
Women for Sleeping Vol.2 : The Most Beautiful Sleeping Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd099f9816cde2bc5b8010c90c0a85a52f06c8393325b713f8d96f7a0a111a19e. 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/ITS781800629.
Musica Relajante para Mascotas : Sueno Tranquilo para Perros y Gatos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2967e723703c9be5f2206397cc6b6817471d95e74a9c26f2a0eb7fea1faf4b31. 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/ITS781800614.
Sleep Peacefully Vol.2 : Contemporary Piano for Sleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2967e723703c9be5f2206397cc6b6817471d95e74a9c26f2a0eb7fea1faf4b31. 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/ITS781800614.
Sleep Peacefully : Contemporary Piano for Sleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60638fa74f5944dda874d403d63cb0b9623ca8e2d2129b0defae56e9d4af5bc0. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ITS781800240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0d67a7a2f5e4bc553be48048ade3b8b9167426b36a654917ee8ac287333127. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ITS781901174.