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 0xda874087db26ae9563823a0d69a386d6305528f4bcba57c6072706d781ac919e. 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/d307a0a5-2b7d-42ad-9868-81a164be74c7.json and https://artists.proofprofile.net/proofs/artist/d307a0a5-2b7d-42ad-9868-81a164be74c7.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 0x37ae49b696d1467b0f6cb2a85931e640dd9a5edc9b7268c7f00e7165fbabce75. 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/USLD91727446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37b6f600a1b6fd352ef35ef0bafad5c4004739b1fa942968f3e2b8dd18827db. 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/USLD91728694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a85adbee4de09a2a0027510dab0c3864ed7ef46665b85ca2142f15dd418ad3. 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/USLD91728695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf528b187cf55571f568f57bdb0314826fb1cd85412d8cc5a822c67f3aa304d13. 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/USLD91728696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e16c42d62142e5f5e778afac24f56012816455088b29cc2111befe8e917123. 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/USLD91727936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4c85322357609c6c76fc776acc98cfea95b6e9909a6c65b76ab125a10b2bdf. 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/USLD91728697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe419c59bdeb33282ff8ef4daabb903c132d6d54b31a325af9a910db7990286da. 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/USLD91728698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99bd19ac0e17e80ec730cb5e0a119e8118816a3b698c4b2ef8e0f576f1e5b80. 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/QZRUP2300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7440671f4d0e7cd81e3bda66a1cf2d8f9fcd779fb744c4abc23469fe0180ad. 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/QM24S2203063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87f69054abbb63fe23235558106641e17e58d3dff561933a944034f32aa87d4. 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/USLD91737826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0887d1cb05610be9ca8220f337cb35caddbc6711fb7e3dc124dd1ebd98c28f. 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/QZTVM2112869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d3b4b130e19a7ba77819adbdbfe7fb3eeacf9f128d39be3ce39b77df607d45. 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/USLD91735976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323f13645359dcf3d86e83ff6e6c6b8377473a6715bb3f6874365c3505272e46. 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/USLD91735428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9922945d87cc6e02626d2080b0176d27748649a1582978a81926a39b7f2d84d0. 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/USLD91730237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8960f005c03caf46a191d09305214e5aa9101b9efcb3a6ae3526efea57897a0. 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/USLD91730290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9922945d87cc6e02626d2080b0176d27748649a1582978a81926a39b7f2d84d0. 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/USLD91730237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b483a6d210594e4043ff356a40ca18ec0514c6a5c8504efc5fad3f75ab0e25a. 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/USLD91730238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6e159ed902fac253c890285b250c3b426cec8a46cac86b62924684a2acff8f. 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/USLD91730239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14b19442a3c2393a49716077af33d3945cdbb0d5f51a9665917c4ffae97d0ad. 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/USLD91729761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4c85322357609c6c76fc776acc98cfea95b6e9909a6c65b76ab125a10b2bdf. 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/USLD91728697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6df342ce1d67126c3c893e0d1809c7626604c7a6ff6319e9b44f7875e29a85. 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/USLD91726435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e16c42d62142e5f5e778afac24f56012816455088b29cc2111befe8e917123. 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/USLD91727936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ae49b696d1467b0f6cb2a85931e640dd9a5edc9b7268c7f00e7165fbabce75. 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/USLD91727446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b853673d39787dff398ba9a7050e421cd0c2978c2acfe7d39c5fcbd7d166518. 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/USAT22004027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce2eb8d770bcbbb7a0a910b07293e619b70eb97de7af7b43b7c3004c8773aa5. 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/USLD91722624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9302be9b9a62138dbc9f4937dc9b46920525c56172ba13bd57c1b85ae3ad457d. 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/USLD91722625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c8e7d8b559cbc496e95a37ee3bd29e82d71c6528b015d40ca5dcb0d47b583f. 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/USLD91722626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8288022863f43d6c7b383ae78d471669155898b76799a0871322401dece3a0. 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/USLD91721611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686c1f6bfbcf7e039f79b93769ad1f60f6f3d0c50baae977067fed055a62836b. 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/USLD91722628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f50c05d4c23d38d89597ccd1e92383d738d113a44e7ee16dcefdf40e605fffb. 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/USLD91722171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f50c05d4c23d38d89597ccd1e92383d738d113a44e7ee16dcefdf40e605fffb. 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/USLD91722171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8288022863f43d6c7b383ae78d471669155898b76799a0871322401dece3a0. 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/USLD91721611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156c52d54a6b12bf5294e2ac3d18117c7aa90a596daa71a6385f87d6d5fe1784. 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/QZK6N1912124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c6d704b941c17b7d4cd51c27f565a3d1e0741ee623723c3451445ae61c29fe. 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/TCAEI1921829.