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 0xcd02d0d2e231f20809730b3ce2d7f7560cf9e77a2f4de4b1926cdb530f979f53. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c084c8f-5caf-49f0-a334-897c483802fe.json and https://artists.proofprofile.net/proofs/artist/1c084c8f-5caf-49f0-a334-897c483802fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Here Comes The Sun: Acoustic Guitar Classics, 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 0x373c579cf9c9175cc8c5f6b318bda5eba5e768a4d2148af2838d3118c74d3e50. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/US4R30905434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069891f4845458b94bb1c0c39ff3d70a144bbbc43f760faffa0a4d0616a7b0a1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US4R30902881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b451b690f00c676769a5bae085e77e91c29ec5c1c502b4ed4c80c774f79f61a. 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/US4R31320055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad4feac3ab41a49e1305a7a30b70bff64951b3164f69472978e1b5f8dffcd9e. 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/CAM460407436.
Here Comes the Sun - Acoustic Guitar Classics Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a5ec6611b2f652c79bda11c50a6faec6e1ae5725a0e0fa92111f8e0360b351. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US4R31333959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c31507733ebfe209b945abab4c713783a70f4874efcf82fdcc48892a87091f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/US4R31333957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7443cd824d6d345f366e883fd8d2c257ebae6bf6d31905b6329e7708042f355b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:01:41Z), 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/US4R31333956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e7665b5ddd61fe16820d064b5f05b576b94c509a16120f2ec586f4384cf237. 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/US4R31333954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c92d3586d147bc3e0a185442fa8273d9204c27c4fdf2e7e6c42bfbbabb6d2e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US4R31333952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a89b9bdb3fb3f4c0d0e68d5276f69e7d1bcfdf1facd20aaf198161f39894391. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:14:22Z), 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/US4R31304884.
Morning Has Broken: Acoustic Guitar Classics, Vol. 2
Moondance: Acoustic Guitar Classics, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8caa808d3e7e63865e9ebd43d6a4f9832d79c9c9a37b1f78ea7d5db7d296d6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:16:18Z), 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/US4R31237685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae3290b31a04058f3759d3bffafb5efd45ea00ca73e2f657539b52645821e23. 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/US4R31012371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83ce44a1940240799ef2673cc981384d230b60437ed2feb2f59caa02d71705e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US4R30603800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bd57f5e7dfba95d237619a1147e2a1949dfb0c3582a5c8ca678f264b974c43. 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/US4R30603802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cebdf7eab5f9faa445305507fe736ea00da219a5eac4dbef147d028926c4c07. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/US4R30603805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb5ac323a1a64ade4d206d61097fc1941d8c548844cdf32f4dcf8a7e56ed88a. 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/USCGJ0742720.