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 0x09248c24c6aef06cfcf49a0e504f55de744435adf508400bcc43fd7fea48453a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40eb02d4-7d8c-40eb-847c-389b927dc8ce.json and https://artists.proofprofile.net/proofs/artist/40eb02d4-7d8c-40eb-847c-389b927dc8ce.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 0x66066c400d919641f87401a88c119ddceb2f6f2872347d0b9b356d11a4e34691. 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/HUA791700063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f01207c35dbb85b981012074756305f6789ec36a8330b09fbc739e0b53696d6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HUA792100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87da1aec0415b7df3b4b5ebbfd1159e7cdd9916d31999bc3a311939bbc89661a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA792100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3499efc5327ffb1c6b0fd0f13d170e71d7b1de65237ea9902f1c5d46a53c8df6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA792100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c32725008cd13b93e5f6ea3518c3cd355022f6a5b0f53e086d90042adf498fe. 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/FR10S1760145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b7efa88b62bed9de9e9a8d70b09044b53f45f1aa90450533875600c9c80a1d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA792000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bc1081c2a63df53fc34be700cedcc32998c93b55d3d9b18b0fa79287983c54. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA791900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035ffe27aac555ef64d3d21a0b3de7b91ca1375308e5f34526ba5ceac58d17b4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUA791900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a560dfa89af251bb6b668dfe199ab2c23ddcf9f4902bc53f4d61db6554212a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUA791900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ff838cfd317cdc4e15dbcfb4267b1b2e73b23c9ef3e5709aefa411a9120354. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUA791400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34228056f5644b229452be139d6f78766ce3d864187cfdb5321d9fa60fd7cf3e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HUA791400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c124554ea5b434d03043d6307d40c0e4795564702afbc2919b1d695f585a1c1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA791400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb759232ddbc632bbf39eea0aa88fa39913a2a3c5e003ce59bec289648cf265b5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HUA791400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe078968e66591b68f61af1ce8a77e916e19e8053021b9a8d046ffa16c334a597. 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/HUA791400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cc1be0971302b57ed5ba0ef2f1b9e66eab85f59d958e0083a2bc8dd4d8935b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HUA791400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a3e646d3ab6a95b3765900c4b301f8107dad2a7aaf16907064bf2f5da05881. 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/HUA791400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f84497165e05b7d5bba3fe4ff6ba6ff4d32d698acc847a26b2b0058e202e76. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA791400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c8f4925536996478e18c7b1f4e5df1653a6fa3d7f06807ba3fb18f845bef9f. 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/HUA792200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2706372a94f778c80b3bc2e78be6b2addf086c8281fde939a8a33e7a04d6fc0. 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/HUA792000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40544fe08765f0353249e41262c335d38168718ce9f4de0f49955eb56dbba394. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA792000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91877e2eca1795e8e00c737b2ee5c2d60673abf52486a86cd9c72d6e62d0922d. 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/HUA792000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc87d48551d472fe0a4ea02e5fa4b5c1baf8d4da34bde69f7a6a25bc79d1cbc. 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/HUA792000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3359b52af28d74bf08d18ef3d1958c972a015af727e961de1f6aee7aff4195b8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HUA791900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368289a19e6d6d6f4fac91bdabd5dec05b67e867ea790a7cc6e904d65d7023a1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUA791900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f80f525ef1eb8d15ebc6f3b46cb3a4f525ac0431b7103de0fb05380b39a33c. 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/HUA791700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff14a84ddce49f1893790460cd7db9e4539ea26fa393eab37c3e720729acc54. 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/HUA791400686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4036676c6e9fdf5a94e1f271b26db7b5c2b5da02026bd3c2dc33d1315c8ee4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA791400615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267e7530aee8c27d2292191141ee5decc95c619e297047b6b1bc5e587a3ae571. 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/HUA791400398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5381c9f0038cffb68c174b2634208e6e7daa722d73120165e30f9d138d2109f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HUA791400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30c0c229298f0df950b6c15b8006ba6201279b302c922900f249f12c7a585b8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUA791400405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d4879693ca21bb5cb7ec3242897985e5bfa70cab42d8befce2e30adaebaced. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HUA791400418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c640e9330ce37b9d642453a79ed890bcac726d74f6d0329416b5ea2fbc40ab. 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/HUA791400347.