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 0x7515150133e079869ee177aa952793cca4577add49de2709b172050195a7358f. 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/7f596ea2-749e-4182-a941-1fff2192f3f7.json and https://artists.proofprofile.net/proofs/artist/7f596ea2-749e-4182-a941-1fff2192f3f7.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 0x15dede73c9c7fc0b6c2d45cd8d31385ef389b84828b33dc95db12302655908c9. 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/USA2P2316862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87a844283254b4d46fdcf30234ac91f41df4e04275bcaf783c63d0be55ec475. 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/USA2P2354418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5948047b8954cea9b2740f6d5906489ca79209fee98c47265b6b018203e9e1ec. 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/USA2P2347527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3b0e836684ae48d63ef8f802511e64f5f3a8d018e96afc98abaf9864af6347. 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/USA2P2314857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ccdf3295e42a3818cb40badff921ddb3555e0ef8714aad2efae68d52320151. 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/TCAEY2057282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71506fabf41c97ea3501f81a39040075c234a9e9725c0f38e17b5940a7be9e4. 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/USA2P2330515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71506fabf41c97ea3501f81a39040075c234a9e9725c0f38e17b5940a7be9e4. 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/USA2P2330515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f66a001aeed76c040eca88be28aeaa5ca048944e072c147b5a0e8d2dd5a274. 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/USA2P2419313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7d716e6b208181cbd35bcb73648c9e92549b61fb2a652aafefcc0430f98f25. 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/USA2P2344679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64b5b38f47b2475759b29f49f3e0362ed24319f36a4c3a1754c2d573733eea5. 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/USA2P2225784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5659ff0bb93eae09e497869228f4aba65ef19d3e2e1b47090df1393275a58f. 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/USA2P2234242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626263940e0b3291d75f712e6f589b890daf835bdbaeda575fefdab519177d36. 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/USA2P2222294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859b5198902ce3093f1bf255951a9e1fc06f0e30e5e16d7f7dea24fd70caedbb. 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/USA2P2342844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31da7a95d3bcc13a97e83ec61d21994ceb7ff1619aa96b9794d14ab29a30c41f. 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/NLRD52024524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44968d6e4425d60bd6fb6cdde0879b5334d8b52d1141de8d96aff24f58bc04b1. 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/DGA0Q2347703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0d91566496499c6c4b5253d5b2814245a2ba05076bc06fb90b7888c53c54ad. 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/USA2P2360847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f7a1e936341cb1156bf5ac8613a11bde21881e88c7857f29fbf99699469d39. 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/USA2P2354625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae142ad21834e125eb17e5a97231db6d5dbb34bd05f5dd65c9cda3b71875970. 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/USA2P2470423.