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 0x305c638fc489a35e6602274042616e0b14688a759628c698ef89db6630154338. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/790fbb67-a5b8-4718-921e-c106f8c32039.json and https://artists.proofprofile.net/proofs/artist/790fbb67-a5b8-4718-921e-c106f8c32039.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 0x44565e3767892aed83d58c8443fe0a6344cf7d5c8a19d52414c1abb5303429a3. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/US58L0514601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097e035abe285841aab02dca1b60f57432f746ac90b16d09c1b22c2c50550b64. 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/US58L0514602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be33a1e08a0a6240703dfaac91c54eeec385d27ed2b42e0246e46a8c0cffb73. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/US58L0514603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061ebffc88fb387dc5c4af3998f11738121dd4d37a23c935857db02f9d79237b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/US58L0514604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7214b956dcbecdb52f24d53e3bd4aa6ce0d78a3462fa6c66c7f25eb57a2608. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US58L0514605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f45989420c309575637619d33bd7804dc0fd4c96ab526c3fc4985c0e865c42. 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/US58L0734401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25aca1b64940df39347ef28c628f7828546360cb84fb5b81b190f91ae4c966d. 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/US58L0734402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9f18277d951413381bdcba541d284fa979805ec6269bb5c4b7c07f25f08b05. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/US58L0734403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7ebdd70baeebd460ca6646fb5c077ab69220c26a997f4b014a1cab7aafed9a. 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/US58L0734404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa014d78a45d3ee561664d19c14c94ca9f1d0d7947ac85415d95cbdc70c2b76c. 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/US58L0734405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbd54606e8acf8a89f42896543deaf6507b18f0c37fcfa2468a02f770f60e92. 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/US58L0734406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fc285c9ba7fbeff52552cde4d83d783f57dfee0af96e08e81ca7a16b65b3d2. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/US58L0734407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bf49ee9552749ee6b874197e06d0129c9a87e291822117ed6724f0fb1068df. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US58L0734408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce359b3838db0f406051cf2d26a1aa7e5709a36c179d710cee995ea639da755. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/US58L0734409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669d89b007a36d393862123218e1747085063e68dd8540d88d27724b6cb553a8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US58L0734410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827d85da09a2675ccf200f78452466f3aec6f7fac4cb51352a4c55fd455ae446. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/US58L0734411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b37c133a124daa21c1f1b901fb1d6cf9e25844542f03b1f75dd06e31c5e501e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US58L0734412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6fc55d933690e5b3195110d3d1b103ffece40ec8adf2fc7d8d94350f7f7a60. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US58L0734413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b16cf4006d4a8653cf91966a0d909261e9890bb6f37c8c49d85d7faf19b315. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/US58L0734414.