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 0xf566dc6104280b4c3bd05e92bccc5c53e4c69c418675567dcfd00cad562f77d4. 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/62b61535-964e-40c1-9194-e7920940c97d.json and https://artists.proofprofile.net/proofs/artist/62b61535-964e-40c1-9194-e7920940c97d.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 0xef6687871872b8ad674f6b329a39713288b704bea85e05233189ae26db766f9e. 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/QZDA62523604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4079eaf3f3214d1902eed12c6540858af0eea4013f3dcebe70caa1312616be. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZDA62523605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565f3b0974255b00235db20ee47a8bb3c5bd71edb52fac566f33a43e1560f932. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZDA62523606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33188cb42e3e3e4c055bbdd9173bc31df7621bca9c96566f0c59c2f03bcdac61. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA62523607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a47063fba61014a0072b8b464a74c4a6bf5b0c054598e2cfd0e43b7d8dbdc45. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA62523608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc478b761fbfc9c2ab8d417978d51df23aa422ffd8ffd53937e8ebb93220f997. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZDA62523609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ddf95ccc7f175f943b11d5929627e0a08c0c6c26b59c175b66a3af5eb98939. 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/QZDA62523610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686ecf21a7686dbe0237a27719d9d72042b3fd33e313386245d655f72b82c641. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN52557844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9db0f09a691905dc86af1fcabb9bb1a72c0b705218d0cb2f4079b79883c0ec. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZHN52557845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc393dff48e2f80aa7e3b6d89274ed955413f200f43814262e9ca2fa179a2fad4. 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/QZHN52557846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3594b7813e80974f49282d9ec1bf7513d4397f61cc386d2b4e39050539fb6e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHN52557847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032220b518b17456b83f1cb820bb654e41e4a31a65dc5cda72c74d1e0f86397c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHN52557848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fcc9af2e94d31077d867bb0d30e0a3ccbccf757337c1fc0cacf292ec81b0b2. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZHN52557849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe803fe16195717d85022fbca144b09e5df330ec8e7bced06c2644c87a5184b5b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:48:34Z), 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/QZHN52557850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f4cfb4a3a9d2f28b5fb629f6b8fa7bf4e6d9c5fb384d7f575f9ca29939c975. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:22:08Z), 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/QZHN52557851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba63de0acbfe7c335da48d25632db1a0c189747f2b95220d4f9e74445f5ab4cf. 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/QZHN52557852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30c8b2961f9d2718629b82baad8969ed5fb89ad4048bfb4eeca444b7af4bc86. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:01:30Z), 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/QZHN52557853.