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 0x5148f6d1d125f7cb8b4cacb8dad368676672066c49d9087866a59300c5331eca. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cf55f4e-390b-450c-b8c3-820d68e4ee4b.json and https://artists.proofprofile.net/proofs/artist/3cf55f4e-390b-450c-b8c3-820d68e4ee4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Biesiada: Party Music from Poland vol. 1
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 0x6e284049ebd4d1b26b6aebeebff301da82404f3a662b7428d33c3344df3a43f4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:13:46Z), 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/USJSJ1013789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c6481048733cae0db1f5ca9e2598ce263cee5d82ab25f73fd56dbaf03cd773. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USJSJ1013792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebd01c874b42d1aa5200a4faf3c4a2df2393c3c17d9d10de22560bc46d428d0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USJSJ1013797.
Biesiada: Party Music from Poland vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1666fac723b6ebf8cf8a129823b6242f563dc6a5174f22e44b419ff717036e7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USJSJ1013841.
Biesiada: Party Music from Poland vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927a942ec0d91f4f1004030e227227f67d385dcb95d0f7bd5eb36ba4dc67b4ad. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USJSJ1013806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c567fc7446b1d00a93dd4aba71cd27d85088b675d463cf843f071440f79301. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:55Z), 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/USJSJ1013809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17a01669da3266a800daab68cc08a190535564a934f4fe15491035774f3a2fd. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:01:41Z), 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/USJSJ1013813.
Biesiada: Party Music from Poland vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df215b6cb96868fe481cfb40ed5f7c36675d49066feba7b9235a0d1edd89dfe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USJSJ1013827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1afe031953c653d0696a3514202a439127ba6d5ecabb569903566dbeb7c1e88. 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/USJSJ1013828.