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 0x22a6c508e0e9c2a67ea53722174d60b82c1ab205ce7d99d64cbc9cd3e4932e9d. 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/5db76a28-2a58-47ef-82c6-1a0148183e25.json and https://artists.proofprofile.net/proofs/artist/5db76a28-2a58-47ef-82c6-1a0148183e25.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 0x2dd84634a22c3e42cd42434fdf38a0eb8a729834cf06488cde706119d182589e. 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/USUYG1068231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd04cea036624bf5f335b9e18e943e372723e555413633a931b0298ab898ed5. 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/USUYG1068232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe798f5f2840c7cff891869881df0e2412d8edab1680ee7233b3cb0a2c376f43c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USUYG1068233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2299ae533ec1c2059465070f81e90c44061455918cc896e0f95e3b9a6c6c2281. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USUYG1163719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c72aedecd3d463007883512be7cd1aa4f53af21ff124208ec8f0b09d767fe1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USUYG1198998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eb2325d44d4f1477e03b1350965d515937c9c4ba191107192884d42a268872. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUYG1198999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7b18df22eddd689ae86c3a1592ad4f185d0a01db2f8ca2f395b71e709e2be4. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USUYG1199000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a94ac908713302f1da991dfa22233f1d09d7624cbf1f2db1362efc4b17ee493. 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/USUYG1199001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7e0907eaf352f82f631699152d72a01b0cd906f34a5d3be83ce60e564fa4d5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES18B1501578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24960df5bcab7a648fcb957dbea5764a649e1fcf15f57937c78627f24736b6a5. 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/SE6I32000574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc74c4ccb94c5f8b4d64c854de56e4b5dc432dd4b8325838586dc770f1b8f27. 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/MXUM72300434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddeca2d9720c41c1d279f0cffd0829111da1efc84c471aa983cb7215b038125. 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/MX5332100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3ed2e40a1f214d4eca27f91d716b9adc596e754ff6887532eacaec4cc060f2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEKB71677083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec799c0eae4f6218420c0edc3ac3e65edf3b4beb3b7aeb42ade76f40da7508d. 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/SE62M2172782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7605e15bb0631128b5b7e197f58064941ae397fb0a740ff2ca378c1b9aabb4a3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USB252302859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d64fb73e27b01865ad868093fbb406f89f6f874c88d386074cf47a1127f4fa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USB252346909.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883f1c8053547087615338432b7293ba9c5c25464ecf347f3463b725b00ef47e. 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/QZW9N2205491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc530c5190ce33917250f42ccb6f3cc5ba5fb287bebf755ae82aab11fd33e98. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZCE61840274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58f43e1ca0a8886565655cc0ce82e876b2f915e427c6727327eb4642b0abfa6. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/NLRD52353075.