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 0x34cf1b046ddc993b561dd5af41af55f783c1934db9e5dee8694ec04c944d6982. 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/f006825d-deb6-4184-ae22-3d2c2196ca0e.json and https://artists.proofprofile.net/proofs/artist/f006825d-deb6-4184-ae22-3d2c2196ca0e.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 0xa8af65f69ecfe8df337f8903a9ac3c668a14a5818e9797490c1298bcca9e543d. 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/TWCC32310236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46c1727fcf26c7419963657b0d4a62392ba0faac523ed44326c38902ef91cfe. 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/TWCC32310237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc5226a1939327df31b328b3e0150ad090f4535b7bd770b4767b158a3bf1f03. 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/TWCC32310238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13a991b2535b0c2419e039cf5c0db451c87998bd2b06510719635e5e7e1ea57. 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/TWCC32310239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc6dd79767c12af47cd60bd83f7be7b77840783a9d05c5aa1a1b11899a9c707. 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/TWCC32310240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52a5ae19394f76106fbca1bc04e65ff95502d500fe424372d4fd00209b579d0. 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/TWCC32310241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159c0acb5713a4bfbce8fd17f46f6a582c62e29bf0d96b5d7e1b4db61765a35a. 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/TWCC32310242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c834a82e882a93cba4214992ad5af5bf326b5f8550b4db3ef5e13c4fa581c5d. 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/TWCC32310243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec1b5135de8441640479602cd6d6c84b51defd6b73fb514c24dfb2c5988da0f. 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/TWCC32310244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4590897373a3faa34000283a2d00dfb33c882122bc1e0b5fe3cdf462693f0ab2. 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/TWCC32310245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e068b95cc76a64be9a258a21614afb29350bf615485023d6bfae1d5629fee7. 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/TWCC32402520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c333d044ba5dce47e4f31db3b5cb4e3fead501d85481a0eef10f4239b15810b. 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/TWCC32309849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ec99929eb50c7376f814beb093fff75b8ff63ed0193dcc86b22b1bfc3c0991. 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/TWCC32303971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665a92fc6b70883f1824165eba0e6e6a598a9060ce62824afd42b93d55fa969e. 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/TWCC32212045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf516f9cc93bc4dfff124ee4acb9ef2946f42a83088a21a62e2ea36baa3e334ba. 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/TWCC32209508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa76ffbd32c1ef56befc4aac0e33218e991f159115c6728b9911fa8075d2c639. 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/TWCC32209197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f54acd2be10586bbf86ca8d556b048a526e0a25be86eb1e727f6c250d5e07b. 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/TWCC32209198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a96c196880d38db07e6c5810ffd327fc1ad032d19825c6ce13f36cc7a206af. 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/TWCC32209199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09919f21f5c81615b2ce874735dfce24e2e4f2503b032a72f047d01f9ae195b4. 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/TWCC32209200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a300e3415312237bcd6a395a26c9d3c1b991920c93c8da057bba938f44b64d. 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/TWCC32209201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835b9d4b23c688c49daba59a8ca158aed10d6141fc6f8bd6b92afab0c5b977b5. 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/TWCC32209202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b088efb85a9485c1b33d237177c8f40850658807e0e1d2776ba23ba249939b. 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/TWAE32100372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeea690a69977155c922e467a3517d23c768e30cbfe1ce603091eb73dafd0b36. 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/TWCC32207339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7da414751c98c4e8c44d6d59754150187980d67a5c1d9fda760261102305479. 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/TWCC32207340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61d9d9db275f3b2ec289b8d8bfc556ac5afda6d3dd03beb930924ab7bf4c88d. 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/TWCC32207341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ed56143b2552c963e6b83d4e1cab2bea1e87dc88ccd82904839d11e8adbe4b. 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/TWCC32207342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b5e768ce5cfd8f42954633f162b81cf71d4a60f713d53f131c9ec29f5934fa. 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/TWCC32207343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6d951b2459eeea8c69653071b989095412c3fe14ef677c8c9d5ff0a4169856. 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/TWCC32419120.