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 0x2435a71d4cac4d0b16bcf9ee4fba5ec5fa0a0115fedf5759c9742d00ecbff6ce. 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/2842838b-a066-4a85-87c6-de1731cfeef1.json and https://artists.proofprofile.net/proofs/artist/2842838b-a066-4a85-87c6-de1731cfeef1.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 0x3b8d813a1481330e6bcbf1ad988107ef4af9c36961f1a29b467854d4da98887a. 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/ITDF62277002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fcbb5bf0da7fa8250dd6c22f1074926187df277437ebd08e008aa2818a9558. 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/ITDF62277003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf84df1f8c5d7966bd35de4246f643b3afc71c4fa0f5fb1b11c1c9a35a837cf. 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/ITDF62277004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b5cfe3638e6c4da2eccaaa1328da61d92197f06588ed3b6968c1d1e5eb598c. 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/ITDF62277005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2619729964875be112b5537956de472e4c510f37174fcc9eaaeb3cd3ba8cad49. 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/ITDF62277006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340895b4e358810815efcd1d7e833d9d782ec3ea4245cb21db3f866fbacd0a22. 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/ITDF62277007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ab470983afcb29484cfe1239126de00d059ca121429b1aba1d4882b8c5adca. 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/ITDF62077152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03b8082721aec41f04d85d8080cb23d2431e9f4237e20b86e8e9f7dc6dcf7e3. 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/ITDF62077153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e5c91dd8f8c6b1a9dcc319c26812a7c829f4a1bad2334d6431c3ea1b792662. 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/ITDF62077007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65ce6f1ca71f36f6263dbd9ebef1aa97d5db2025d2dc5745ba919b5550e5445. 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/ITDF62077154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8050c9e6b1265c818298a1fb014d5fc9eb24d49431ce27f07a3e2f5ebaf44480. 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/ITDF62177101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984d0c603c43f91685580a0e6326e9b8ea53a17f31a4b5f5efdc5a8bdf9dad09. 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/ITDF62077156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde78f1872fb0fa9b139e1cbab1b60e919f25cfd385b64722f752891cf8b75b3f. 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/ITDF62077131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48849f51adf5468ba1d80a61f2f0d2274e7818b2e0a2ca7ae14b2f7309b35c04. 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/ITDF62077157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2df6ed13adef9818f827f670d70b359ed1310d197d71617d6fbbae2aebea8b. 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/ITDF62077132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc8fea2a3e2aa138ec1623f12c9fae36b552dd69dcd17badc5c2504c0b42cdf. 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/ITDF62077073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ed1bbcf6a1ce8999519e008cbfe2fac50597b09fd63b0b61732a55a162fb1e. 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/ITDF62077158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ccae996b260013602a964ccd3d1267491bcaeea0259d8f7afbaf33fa23c3a0. 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/ITDF62077159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ab470983afcb29484cfe1239126de00d059ca121429b1aba1d4882b8c5adca. 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/ITDF62077152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03b8082721aec41f04d85d8080cb23d2431e9f4237e20b86e8e9f7dc6dcf7e3. 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/ITDF62077153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e5c91dd8f8c6b1a9dcc319c26812a7c829f4a1bad2334d6431c3ea1b792662. 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/ITDF62077007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65ce6f1ca71f36f6263dbd9ebef1aa97d5db2025d2dc5745ba919b5550e5445. 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/ITDF62077154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cbc4e50e0a29fbd9b0e9520a3b6beaced33c93cc42cac03a3337de6478ae7c. 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/ITDF62077155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984d0c603c43f91685580a0e6326e9b8ea53a17f31a4b5f5efdc5a8bdf9dad09. 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/ITDF62077156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde78f1872fb0fa9b139e1cbab1b60e919f25cfd385b64722f752891cf8b75b3f. 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/ITDF62077131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48849f51adf5468ba1d80a61f2f0d2274e7818b2e0a2ca7ae14b2f7309b35c04. 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/ITDF62077157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2df6ed13adef9818f827f670d70b359ed1310d197d71617d6fbbae2aebea8b. 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/ITDF62077132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc8fea2a3e2aa138ec1623f12c9fae36b552dd69dcd17badc5c2504c0b42cdf. 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/ITDF62077073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ed1bbcf6a1ce8999519e008cbfe2fac50597b09fd63b0b61732a55a162fb1e. 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/ITDF62077158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ccae996b260013602a964ccd3d1267491bcaeea0259d8f7afbaf33fa23c3a0. 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/ITDF62077159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b0cdbc4466b78eac7f2b7c6a5833d0f5aa2e6b10c5e2d961803bf451b20a7e. 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/ITUM72300948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa701cb777ce9ec392982ef449cf84e4ca91b60ac6b94d86505398d9524be0f87. 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/ITUM72300620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d65c12dccfe13e32ef4068725167d22806692f2cc6b6b051ce25eeaa54066ca. 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/ITUM72400873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ec4208e51da0d5896ec11224f3937ecc72a96956088ec966be1b5c3280461e. 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/ITUM72400875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb826b553aa93e5f43ebef62dc991b3af01c02ce89e5c7186a0af7cf867033aa. 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/ITUM72400876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1451853ad01f6e07d409af7c6fd58ee69165ae3c62a6817b81fcde77eaa86f6. 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/IT1O72501290.