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 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 0x2e345d5e161cbc73774284ebb1f9bf5d3041bd6669e15eda7826d7d7918fe6a5. 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/ae1f9513-2909-46f3-b08f-cfd435f00e36.json and https://artists.proofprofile.net/proofs/artist/ae1f9513-2909-46f3-b08f-cfd435f00e36.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 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 0xaa58dfb2d78b9214865a10f4b191f6862fdad0a4c755ec0fcc1dfb4164defd94. 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/ITZKO1705047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afc8e19e711ad9684b43fe8bc3fa46e05023565b9cbf3b19772e0d5729be5f2. 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/ITZKO1705048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9891ba2749272911ab8885c657070816145ba504729fb296d7a34bc073bfae5. 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/ITZKO1705049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d5e21684c1c17abc2b240e5dad3da32d0089458c0817eabf351d5c842cf910. 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/ITZKO1705050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fcc76fa196fe0eff792255345b1fa88071f2c1b01e59a0c36a8968bdd7e6c2. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:04:25Z), 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/ITZKO1705051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90f5ac6d3e652e2fc491c1f23bed4fa38fa2bad62d2b76e3bd3de583cb83d5f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITZKO1705052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3012a5e8114fdc7c870857277c5e0306677c7719a563142351cfb4cb392bbeb8. 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/ITZKO1705053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5f55bb866a8409c16cf30ca6e7d3279a7f28fa46d221238568cf8e18bdd861. 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/ITZKO1705055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f653c10f8b9318c09a87883c9e8772785cb6ed08e19b861129075f2f97ee78b. 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/ITZKO1705056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0642aea037e35d4a0dfede423fbf51553f5d09942f641e8598400742c998961d. 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/ITZKO1712100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a91ef2058b3910a15bdae5bf6868de73ae1ded9b808dbed5e0e4c1443b31523. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/ITZKO1712101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a1b447a838dfb31c3b66c966308c12aa34bf89057c3aa5b48245187f3e8889. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ITZKO1712102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f6ae83109cebf08462dc4947f3dcbbfb3685d218b9ac2745ee9772f94e0ac6. 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/ITZKO1712103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c81f991dd5a5f219e89ce6b106b0757501dfe52e0014edf5221143e37d9944. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:43:35Z), 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/ITZKO1712105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c12ecf7ec8ff6a8158f9011366d7b7fe3397dc9fa8654ca26e44dc16ddb239. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ITX0B2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25c7a05b78c5523c97046ac3b2effa2c097cdd6465990eb48512f819b30437e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BE5HB2100223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fba9038c45e4754ed972053d5f60b19ce2c13d1fadfdb308f1738a2e07a6de. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:27:59Z), 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/BE5HB2100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1ed1857b9882833ab75c9126f748f554f04cb9531999b4cf0843ce894ede40. 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/BE5HB2100234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79be173e232b7a2daeec30cb31aa0ae55201715b2bba9e89539561208eecd61b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BE5HB2100228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f2a5b2f8d9f3e0a8fc0176d391184be29435f22c9ae0c87aec492d8d1af162. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/BE5HB2100230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a46f0ea6549d0aa6a86c732f2e03bc5b6c3ca0700613c071c697386145d0a4. 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/BE5HB2100232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370fc2254c74e424a6cfde653fa32f90da83b040b1ef8af69b4d1da77c49cbcb. 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/BE5HB2100246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d7fd1ce6f0e2ecb7eea9b32ebc8beef1f9c5686cd5b36f70920410c3443933. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:07:35Z), 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/BE5HB2100229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b1f880f1934a0d10445115b4783662ba08523d88d22a9cfb1ad26993f32dad. 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/BE5HB2200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5a174c54df53ac772ffd8924b1a9ae9f4dce7ca8e85c007b80a3bffea48398. 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/QM4TW2413121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5dfe1b4f14ef285ca4ca5f5bb4de5c9f6f413d4e6c027c21d51666fa05b5e03. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:23:15Z), 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/QM4TW2491714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12dbde584399362e80f2ca9eb721c0220cbbcb7232896c750fb89909813e8c1. 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/ITHU52100519.