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 0xf85674ea9b4137767085384c813cc6c3796707dee2c542a33dfad7acddede546. 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/0efc244b-6e96-404d-8426-fe9b4a3bd122.json and https://artists.proofprofile.net/proofs/artist/0efc244b-6e96-404d-8426-fe9b4a3bd122.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 0x9376c9ac695fd3eb2e27dbb674f6f9ec978a476c6b9d6c2deb71b9a085cb5ac7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GX53U2333082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37336137d69996cc04756a8a4dfb5d4e408bc6ac32e3d1a2a0cb99f428f4ed76. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX53U2337686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b6dda025b35bb5da265aa0b656bbeefc76cce13229b0d2ea31eb8161c70dcd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX53U2337675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dfd19a801f36ada1abe7b29c0a0c89341fe632613c88405071b0ff26ecf750. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GX53U2337354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca888ef62dae4f7e3b687427de2327961cfcb850fa55ffba6dac9550d015444. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX53U2349909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc939f5ecdcb7b4fce933e9082f8ae2a73f3531cf6c39ce944beed520bfaafbff. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GX53U2356937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdced8e8996a0d8106daf8858ea45b23844cbfc173f278b9cd22a6c28cca2b46f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX53U2368758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf240c07284753057629e97c877993366df8501c0c822b1179ff37307fda49be6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX53U2368806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71bbe6ccafe8d5f9d5f3fb0346813238baaf0707e4296b2300e5a5610886f60. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/GX53U2378381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72462e9ba0296bce78af7956f529d0ff614de069794c291370e2502140bdfdc3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX53U2379304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4a01676b663f6f6eca05f8f03a36257046e4d3c73353338176c810987b6e8f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GX53U2403679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4055bd34f79509fc667f9d4beb573b05dca8370c6c07f5651911fba3a6e53ba4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX53U2403470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a98464132ca652249fa53b99189a6f504fb1467e5ca928e82a91c8c1eb5f3. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/GX53U2403720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed87a40cd2af9a2739f8806da4c49ce3ec97ee14a64b28868acf34dda98c950. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX53U2428818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e107d1864b7b4465ada726699a3b8cffccdfcaf306f3ae3b952a0baaee771b0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX53U2428819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0345eab058240b2ff68c015f63ec788b2d4a62bb5fb17c9c97f16602558b28. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/GX53U2447740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7652c343b5e1331dc7b7a7a6d9ef6757e2e06b92294d9e470c3262392a8d28. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GXF9Q2480400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c9abb2bc91175926f65f0dde5cac8f30f818b16424827cb37805618b902c89. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/GXF9Q2478519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9437385d1a406ce77e2c72215b991763bb738b1e6fdf11a4124a1f6dc1f9904. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GXF9Q2480277.