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 0x8196f65ae81ac5a98f4dc809b8affcfb788d0fad35f1cef8900f326509c09070. 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/77bea542-bf4a-4d5c-827a-34fad0c91966.json and https://artists.proofprofile.net/proofs/artist/77bea542-bf4a-4d5c-827a-34fad0c91966.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 0x74c0c551203cc5bd3e7f98327fa14709725dab8a4f9d53f7cec9f1c492aeac10. 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/SKA011900158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6518d21cca4dde7d6f87c3b3d37c548f995b14e9fbe12ef16a334a26546133. 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/SKA011900159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369533b99468e77fed4a89dea72ee5be03a0eac4e8ece5d316e4d6c2004d9197. 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/SKA011900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd051b0c123cef79fb6060ef8da6100b251311fa87297ea7e6001fc778e465153. 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/SKA011900161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead0c0647d03680f106a8a2bcd00f35536feb64951f1c60de2d7b137ce8adf90. 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/SKA011900162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcbc85e1b3c5f66372eebd59024ca2b47f546126134737e0ab6cbf47845036a. 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/SKA011900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc611411ac72797b9911a1a14b4efb58e8902c2425b4f3dff1a276dba1ac7c0. 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/SKA011900163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ea6f59db652e1dc2ebe7d6d95a5514a9c4269bac81cb08722a28a330136236. 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/SKA011900164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5e210bf3ff07c17036a461ac3e5b7cf52eb29fbd4d00220fb41c46059675c2. 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/SKA012300455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596829bc53f62f85ef67aae9305bf704998e16155a6db46958d9c2ff8ab31991. 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/SKA012400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb06048a1fb83ecf9e1f54f4f3eb7067901be8165e20e3abba0e6517b440bea0. 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/SKA012200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18841de25f479bfa6c2129b2a821b15a4a6e1a7eacb6cd88c6ad4e9bcdfbbf78. 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/SKA011900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc254dc41a7ff77d0e81ec30187a488d5c4df51f29a38ac5b6d1bf3e9205713a5. 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/SKA012100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3d5ced3e20c6d35ceef29992ff1136f1715467a3432e328b984ee692b3f0d1. 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/TCADJ1755563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4259aaec35f2044e6c551fc6873ab93f606ab846c03e60a6b775b4854ae3d543. 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/TCADJ1755567.