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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e89ab651787755b5b4ac4b0073578dacc3e66e863ef4fee3f00f1c90cec03de. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93148cdf-c2af-421b-af8e-c5b890294d64.json and https://artists.proofprofile.net/proofs/artist/93148cdf-c2af-421b-af8e-c5b890294d64.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b616c6175b6000bf2e385f074863213e0e32281f794e6e68009514f53d18e1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBCML1924501.
Kurtág: Complete Works for Ensemble and Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027c07f98e23aecac2c936d75fb2d659fd54dc7fb5811a917273f5574bbe001b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL3UC2301590.
Michel van der Aa: Spaces of Blank - Mask - Imprint
Param Vir: Wheeling Past the Stars & Other Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0ed897eb7df92ddfeb1714ac278327c6d5a18172d67e3863f5cbe16408eb43. 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/NLC8O2500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754db8a9ccbb3b773c02e1a5578fc6e50dc7d4d7aaf8481f527ce7cb5bd3fdc4. 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/NLC8O2500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b783def7f84b4c6c2d36864ba37ba01c6b452ad9e9255dcaf896deeb7f04d84. 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/NLC8O2500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4d558fa9b81087441746381f8da2061e3d096238818160d4c996bd26ac390d. 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/GBCFB2401319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2decb0f70afce73aa0a0c152dc902e73460cb444f009f9f391dc54bb6a0ae8ed. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBCFB2401320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e4e06b0239a790e5e01ad1481419f2151ceadc5a69ee1180c88b7eb9f202c5. 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/GBCFB2401321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe1c376c51bf78d1041c28b38ac9d95d49c894762ea0a711970d23d19c6fa74. 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/GBCFB2401322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4da2ff07e883b6865e505e421e221ba008975cb91bbe9c0f3009ac47c43274a. 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/GBCFB2401323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649fcf901ab04586ffae35eaf3123213762eeafe455c2687de4ef0d18dab3d40. 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/GBCFB2401324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90308af126b7e1c66c902133ce02f99ca180a3ad980059d2e29775488e4abece. 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/GBCFB2401325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9e5fa87d539b404cd117fde3f797492965fe61cfb355d3b60b6b5a1f3d30e2. 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/GBCFB2401326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4d558fa9b81087441746381f8da2061e3d096238818160d4c996bd26ac390d. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBCFB2401319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fa1c52cceab0f892414a893bad09cfb243731ceaa373a324ba6348c7b355b5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBCFB2000729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f002a55812eea5542af9b3e9e84190ba1620feb3270a9d271573a2d17660030. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBCFB2500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e052ef225bf1fe7763969ec77cde3edec4195e850d72f44fce2e0ad2ac48c88. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL5UZ2507119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c22a2a9c6c588430fa1faec7781b33326d50c4418edeb791b2a273278b809c9. 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/NL5UZ2507120.