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 0xe31e333595fe995fface0bfc84db2088af9b0b567c900833aa9b677884e22fb9. 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/b9eae603-70ce-4045-a68f-0843964b176b.json and https://artists.proofprofile.net/proofs/artist/b9eae603-70ce-4045-a68f-0843964b176b.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 0x61ee9474e5fdf839661b39f403fc86d97929eae455b3e3ae4ba04fe6ba947c1a. 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/BRLSR0600513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585e18827657b3eb2213b076f17a4e248d18a3b61cde7fe05318c5c20af4f855. 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/BRLSR0600514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cef904a048cf13ace135e3b3672a7eb062029fac5f97f42b8f3a2584a645c9d. 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/BRLSR0600515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3e5fa158a9b9649195615ec9c52ae964a161134137e1f860d69e20880be0a0. 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/BRLSR0600516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f29271f632f1c2aaa60017df0cff48012c538615579bdc69dce82fa576e0d9. 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/BRLSR0600517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d13352659958199d2a64fc030dd2829b70de69669e747c7e037582f2623aaeb. 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/BRLSR0600518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cc7211d8799166f6512169387cbb60191bdba8ce8d4d5a46a81824bf2ca539. 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/BRLSR0600519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bc4c8e8416a96c5a4ec2ccdeb5f958a7065eb1f932263936bc9b2ce1cba7a0. 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/BRLSR0600520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a04ae4ea76bc08bb5841fddad2198b915099ae20189ec6ce58fd6e851477ea5. 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/BRLSR0600521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1147dec99a58117bd640e890cb2f33d1060d1abb7d1711300be9b0686f0be407. 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/BRLSR0600522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87044a9ae755c041933766e6c3788cc646a5da5da00427ada8ddc1bfaa6fd773. 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/BRLSR0600523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0033fdb71bd7211f791279c40590a9646943536b93d2620ea185fa08811572. 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/BRLSR0600524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce85eb1c29d6716b7f21ca578f8269a4d3175513154a439b102f84009e16d72d. 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/BRLSR0600525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65daeea1cfe046b0f994fb08f5f6ff0164c665f38fa0f7a454e8518018fd512f. 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/BRLSR0600526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15f36b8d37811d87da36a6b35ce5ec9bfdffe2f491147b2d0923899057a8f08. 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/BRLSR0600527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f4aa1dbf69367f038418bed0e8614766888f3bb43304674f648493dba94c3d. 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/BRLSR0600528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9f56c2a419f535097d73d886b8bfb4cba9bb17ae7fc1ff6a31dfc126aae512. 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/BRLSR0600529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9283d1309f4cc87912e87ea27dd74555de346ab38da94d15c31ab974f83d8590. 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/BRLSR0600530.