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 0xd7b0d9a2ba86606d588c2f6e8af2488123d943268e76356ba93f0984ae6f0d5c. 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/8b894565-7bfd-4c14-ab8a-2c12c0518bdb.json and https://artists.proofprofile.net/proofs/artist/8b894565-7bfd-4c14-ab8a-2c12c0518bdb.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 0xabf7a995a7176c20106ee16bcbc8d1b74cfc9beb2838a5e0dc5d3eee8fe77bb3. 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/CA5KR2348391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2cbca92ea52259b6739c1ef927b36f4d52db16aed5fb28d84eed161b6e4113. 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/ESA012048974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1592f2d055084cf550cdd5a807657739a6a44c9190c85cdf9d70486b5ed9b02. 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/GBSMU6859835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2134c206b621d4ea72433cecb7255a0d5fb94e81a17228d0ace5e87031d670a9. 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/CA5KR2448832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df6892fd69d991b6e25a67a87196d598fed2cf48e8ca0af599d09e1f75fae81. 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/QZMZ92447541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a48f7421f872ccc2baeac790ab89e93b18881ab58763cc5dfddd91d5e1a9377. 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/QZ5AB2446559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e63c4ba0236c7d19a5d931acea097fb6bab638ed251111ba76e4005400f7c9. 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/QZW9M2344720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2219553df5c3d5e5953037e00ad0126152a5f2b07016ecb41cea8adc2f49e6a. 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/QZW9M2344721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd5fa4d9dad3824e47cc4d2da8993ad661d2eed1f674f650898153c938dfca2. 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/QZW9M2344722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bbf44d6c90844d86548055103122cea303e9d2b1b116f6f4e3b53cc574271c. 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/QZNJX2394482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa702c1dff5b2341683111ff3796e4b9f5189f0f9dc655779e144e4eab20621ac. 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/QZN882231955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d85654544d3cf997771798ea6a6affa7b1685f95e54e6f5e2851d98b035e35. 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/CA5KR2350075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011cd21b7199bb8f4681288a13da072fd5063fa638ae0340ac3d3c221cd865c2. 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/CA5KR2347174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45228756f9456aa0cc0fa4181d1fa140990bd1bf5ce0b019a120715ebfdfae1f. 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/CA5KR2337517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49355e8bd66f33e1182779de971508c43e2e048d5074d435763d45cba7ca8f59. 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/CA5KR2326625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a512632bff1ee6389bee260b249db3aa34ff1e1878022481dbd0f0e4ea8b2d2. 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/DGA082245773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36db95098152007d00b922b6369083d146959dda71996080d4d4dc57673a278. 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/CA5KR2300483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abc5b83f84ca6ce5a2560f83c5322b1c38005a874a73945dafb42a4b9731722. 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/CA5KR2301049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f159930e91876f74af8955ffc4051ca990e1f0e3e1cd56e2854d6bda2d715ad. 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/QM6DC2097773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398180643084e2d417ba1d3ff8ee7660a0ab54b8e6e41a76d3a232a800c2cb2a. 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/ES47E2002459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bad660ff1365a804bd0287123cde9e7efa1f83d0d2d5e27c6cc0fab899bedc9. 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/GBLFP1889097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4b9e12f8a7089eb9839f1e74e19fb4a8ff2195090671b0b8119d0fb6a15791. 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/CA5KR2084728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab132544fba11b305eca6d59f05aa3799b6d391569435fb14c89cf09b46f6ee5. 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/CA5KR2063552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffb4a4028bf92c87549f97746a8858d38076fcf3a400c68701769d95a387dc2. 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/TCAEY2045816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bea86388f63d7b736713012a237cf723677133020905120e5ed6b998f364d1c. 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/ESA012063613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc265c1c33359f56e50b97b8c1cd75edfd5717632ca88f585ec992627ff53cb3. 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/CA5KR2036913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb312365c4e2b8b67ff4786255b448b5fac29d2c891d126def44477eae08d26. 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/ESA012029725.