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 0x684ec95935eb185fec401e4beb7162f7f417fc5045e0a1478482354b2155b37a. 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/c383b1d4-2230-45af-bec3-98f3dac83e99.json and https://artists.proofprofile.net/proofs/artist/c383b1d4-2230-45af-bec3-98f3dac83e99.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 0x4f7ac6f8bbb95db217b0945aad44f80b48889652a4e891c49ee97abb0be37abc. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GX8LD2259593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb433d7d0e979fc1b6d2941227ee4bc3dc958d878f9aa2c970cfed1b90e858546. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM4TW2364567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2519b5b8dc0d8bdeb6a79ad48ba45e5cd0a669349db5b66736510b5fa7e81bd. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:43:20Z), 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/QM6P42304380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66cee8a1145b62a614c210b6f54a470bdb83a6316e77beeee847004052c4503. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:37:34Z), 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/QM6P42304381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bb3c6e37d3b965da838e6c7abd3771f89f2f3292d721c1e09424e57edee425. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/GX4R52358332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb4f158b68f122409e814172e6461913ed73494190fd031a179f8a6b7df93a8. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/GX4R52381435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be39e80913e9f7e9a0de6150908710ac25d093ada35981712c6e5248860f52e. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/GX4R52351500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb60b10849773a070a1fdf2781612562f80903479a9a09cc7d635c242427b802. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/GX4R52364725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89984f67bd950554da4c4713c18c335bd22b550f30b483f6a050bce9bbfa4147. 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/QM3DF2291434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4aa286acc95e2f7f97e1954e7630026df4c61d9151f148dc02cfab1a6597250. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:36:42Z), 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/QZVEM2351782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a4910569ce43fe09edbbac7fd94af7bf93c85d8da4f32c90a43460349b7d88. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/US3DF2410155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b7f35994b7348b2cc16a57fb603c6afe66d8a16f76dda587ff835cd3e06a43. 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/QZPEW2508046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb4953ad4a21fd3eac5d579a1beee5bec82e76b42618df0d6a52a43524c4bd7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZPEW2530209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47bce34d4abe36ca2505ebea227ab4f20c2b6217abdf9b7791a9cbf98074629. 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/GXBDT2552707.
Leveza Records: 1 Year of Spreading Lightness
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327afdeeb347277cd7451e740aa0a92f4f353b903f2532df100560d4cef0573d. 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/US3DF2520387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dbedbf897467be3ebfa3816bebbe82e972aaa21d087e07c1bc78edbf3d4f68. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZVEM2322466.
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 0x5be95a11948e7efa236e3758ea4f03ad9b12d3d9ba81f357b607410f4becb313. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZVEM2306373.