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 0x6642f01552b0138276c92fc232433479c10fa19c7a3adc8b5089e10f44bec4f2. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58a5fca2-ff29-43e6-b229-622255931932.json and https://artists.proofprofile.net/proofs/artist/58a5fca2-ff29-43e6-b229-622255931932.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 0xc584c864d0d75e3a88ea7d6f8018dc64887e01fa7d69c1f339f826081711a94c. 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/US83Z1454773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c702853ee8b441e3ad53ebbadab5a44327ad9775ca218b0e40793c2ee8845eb. 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/DEBL61360837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7334de778b0f2cf5e8557082264d25d636eceff1142f495edc36ec80c90278ba. 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/GBWUL1345032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc87ade442aac21055e30d1830715a2aedd012914d98c36ecbaeb9250d5837e. 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/US83Z1211804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcea42a4472bf996699387cb06d6105a5aaef5f5beaaed76cfae557fccc98a8c. 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/US83Z1212815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b1e724ffd813138e001584e7d85d3cc8191d8dae104ad0127703a2182b7fc3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USQY51049973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf1e15bce7172a61e379bf6d67ad73d001eb3c5ab5b9e7d7a08c9366e047bee. 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/CH3130900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d0c0a2d73293d356e12833a78c510bf6247060f66c1d2c77ad6add58cffc1d. 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/CH3130800110.
Schneeweiss II Presented by Oliver Koletzki
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a73b0f492852e20303f01268b1d19c38a670cb7086e776b0c669bc42c8f4e3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEAF71341494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939b39caccb58dbf72b0a1636616ad8f1c10d129592e6e7fe05c3eeb0e10a4f4. 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/DEAF71346498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cf05a465e70df2764f8370c42301237bd3961f349f029d2407027cc5642a87. 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/DEKN60900485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897222fad02a248e26b385bfafbc0a098e537a81c7d2d94e8865c19b76fb3f0b. 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/US83Z1212910.
Rhythm Is A Dancer (Jack Holiday Remix) [feat. Antonella Rocco]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242db75333f50280e97d70cc766d79f1cdf30d31c962449b119b103f1a640647. 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/CH3131005033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ad5a3848f8d11e9a40ef389840fd64131133542e350bbe6acede2e769fc60f. 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/US83Z1003294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e00cd5a8236927fe5e6fafae9fe5b696c4e39ae819a26cac434ddebba820a92. 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/US83Z1477256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d6ca502310c3f7e2fb6af525a256cc875dcf1683c7dd6c13b93288b497bd8e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US83Z1651371.
Waterdance Festival Sessions 02: Kazan (Mixed by Alexey Sonar)