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 0x83a1f09b348733bdddb404c2bce1ef324ba13d02c9894a0747a287039f5f2abf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f8f23de-060d-410d-803e-b5c9dcd2ce8a.json and https://artists.proofprofile.net/proofs/artist/8f8f23de-060d-410d-803e-b5c9dcd2ce8a.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 0xac6d287a5819c55bba545ad8fe891bf23d7972947b7ae8c5d552a8a42f5fcb00. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZHN42011802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6acc0a2ac0a626dc26794bf231e41991c56ad1c9112fead1cc15a54551f09a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN42011803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293a616ff11d974443bcfa48ce86eae54a3e51499ef8d5a6ad60b4870b3fd0aa. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZHN42011811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3d293c54b68761e6c550c7a439383386fea1ee4564dc3bfedca78f6d95eb90. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN32085116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95775bb28c4704f67fa4ea01610ce3b4cbb79b88d3838b00616d472efcc0256a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN32085117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2f8ea75cf1826d90c8fc73ec28cdfc3ee7f55aa6ddcc1c4ce2c9b82e2c769b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:44:48Z), 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/QZHN32085119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98d2fab5988c7bda25ef512a2ee41eccc43c9340db8c53ccf8a77a68d616f1a. 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/QZHN32085120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aec1d2954b4e46882a285eaa46e7b3e71a42ce27e7ba18c60c0b6b19d52a0d6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN32085121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516de0b7f0b02f13dc37f42635c957f5f1b127f253a839111c405c7347a027ac. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZHN32085124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfa6eecd2db8db9759e45ec3d5b3261410fad7609bb90b64e6d320fd725f03d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZHN32085125.
Los Parces (Calle Cardona, Casino, Ceromundo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e660fd611c36802f3ef5f5ada311628fb5467335fb712de0294b140250f5f6d. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZHN32085126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437076ec76e00e110bfaf460d012f9c96aeb712eff1f02faeda81be127509eeb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN32085127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2279746b88d28e3f01790294f03fc86be8a59009abb1bf7c7e8c257b430699. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHNB2005437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbff80d1ffc8dbefda95bc517c3bb3e24680603f08a2be51f0bdca3d44924813. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:07Z), 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/QZHNB2005438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46fe44f8e8e98e902eca0bc4b1e00e00c5f1caba20bfea9df6c33f84ecbf3fb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNB2005439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf97cc8846464759a8bfb57948562fde6a05242d3bf80c20489361bb65fb4849. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHNB2005446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d578165a58581da1560b377bf9864f19d31377e54db59d00244bc8a3624a01. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZHNC2068320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab05595a134804eebe77b94991a4bb716ac38fe9d37282b5b732d290e5ea7d7d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZK6N2068412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e3e6206aeee863f638a005e72871dbc154b0d6430c6b4503a09804027336af. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZMER2369576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab28081ef48a92dcacf32765b37137ce51dcb952f247192c52cbcf635fd25e4. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:14Z), 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/QZTBC2319398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c1b7bea19a65b2384e99a984caab6f02dd80b9c894a282a020530304ec933c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTBC2334300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f937756b4159bf7cd8479131a6b7013c574a95cc0a2ab7942f9e7f73e3a96e0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:05:18Z), 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/QZTBF2333285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfad2003c0653172f31832730483292b889e04aac3e9cff9bcd7532d300f177. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTBD2572555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebbab1d8ec1191d77d3d048237bff58180cb28c827633344d2ccbca43156bb3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9K2237691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0b2369d41ae96e21c373db3c08b93c67444843491b130a7ed72607c0ce3aa4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLM2161014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0b2369d41ae96e21c373db3c08b93c67444843491b130a7ed72607c0ce3aa4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2161014.