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 0x254fcbe444f89494f40cae732421045897646b7913302c7333ca6c4ad4b98bd8. 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/c7b3025d-cd1d-4fc6-b695-b2c24f88c98f.json and https://artists.proofprofile.net/proofs/artist/c7b3025d-cd1d-4fc6-b695-b2c24f88c98f.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 0x15b6afb899d651881564411b943c4b9ccc51ee93657030baef8c626ec5b45d48. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:22:17Z), 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/UKU932345990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d2fc77a6d466c4c1a0b0094b861cb7354a7c4cab39521645be1af80dc76967. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:27:42Z), 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/QMDA72339483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ac8155ed93c802331009ec86ef325de8a9c21ac5baf766c8b98d0934efa960. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:36Z), 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/DGA0Q2380385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a90426cc37f31e8258fb1df24c085486c81b0f3b0fd99fe182c91593f36809. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR2X42423175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab65a99d6050477d92147b72ae2dcc9cb82e0dcb5a633f368fd3d62bbb8b2e2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX762433427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ffcceb6473a0af98bf9263e23ea3d046526fdee224543f6f58fce8b53f67d9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRX872492530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b356b944e789a138e3c605a184f6d80717cb1a550ba24041df1ee1e02b617b0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX872492528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e015065498d6e3f4e758bc9bbfbab4f894765a45f8b70e4701a4253d21473b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA0M2491138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a585511b22a62cfae187b28f585af6256d37b07e2e3d8f6c125a8f925626f3c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA72442499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f80cdc6dd98689654b2efd6908dca06e4f19b41516b71b0d3ddc28e4111f3da. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:48:53Z), 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/QMDA72442501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8193b8965a9ca75ec5c9dd6483ece42303829a416a4939552b30700d9fac00. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:01:44Z), 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/FR10S2581485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571c6b156304cf308ce4661f5192ad35afaefb77b574aa39416f84a596466a87. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FR2X42560870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fbf9f18661b115b896f321717a79419d9a359f8516fd3ae6d3caee1013bf47. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/RUA1D2583100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ce50696d37f9e845cf4f1e21d8cac019867a2081ca0aab15f0d7fdc7815cbd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RUA1D2583102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd14490bff36511ebb028b4e5a375b7588ffd5029b4dec4836a13e170fa6b3e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX452535572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6502bf57d138b023ebd41b3c3b2f5bd60bc43c9cba74f723e6e0260bf5379b1d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX452573489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4000e4eec596206a401b1ab45f6232ec0ec2c1b589cc2390a8b8ea27afeea9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:15:52Z), 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/RUAGT2577149.