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 0x2dd4e735bfc46e0cb641652a1d6b092a748ec23892b8ee465ecc1c930c691bcb. 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/0c087da1-05f0-46d5-92eb-e5a8a263c417.json and https://artists.proofprofile.net/proofs/artist/0c087da1-05f0-46d5-92eb-e5a8a263c417.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 0x805321b383f5859e3af11c41178e389e316408316edd47d62d095e99cb70dac9. 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/TCABP1306303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebb6d747cb5c1f3f02603a56d98c4ce1ac2d2fcc8e245b29e1e7380a3068ddb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCABP1306305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05d5ad9287d3097d35103cf4170c8284a1e34b3a709fd8b82829172fd4a74df. 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/TCABP1306307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622014378f1c0368f9df64d4d10791b77719b92b0604fc05fbe434dc093677db. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCABP1306313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99e0ddf129725afef668d10d9a0f709e38ab4ab77350bb53b6b87f711b2ee1b. 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/TCABP1306316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4d5808359f9456f66a0b2f459e6c80afdc9a99ac7afc8fedee1faaad68d07b. 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/TCABX1488323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82e748497c071576d421fd93062c719ac518974326b27d7d122f5e910434676. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFE2025458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7da8c6850c932393442642163efdd6a251e1950ad67926cc3517efbd7a9ded. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:46:40Z), 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/TCAFE2003047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34682589835b2d077e07b3131d7d65f40b6f6132ed1b8a66d6858b3e092b48ee. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAFE2003074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1146cb9e17b8ad43a279147c0e5f2a697230ebb91e1b55c1487233baa87785e8. 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/TCAFE2003029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85107ab182b597590a326033d6f466f54d800ab012bf26d0ac98915d208304a. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAFE2003076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54117968616fca248f26c32d2e0879bd769ca7dd5d79cc7f719494d34ba115ad. 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/TCAFE2003072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3fbbd08d538e15ef3d079d39622315a1f0a8f893b611504850cd3078d5f6d8. 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/TCACP1614206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f317f33af71be20eb98430d5fcdede4f09bcf547240d94a10e3f11e7876a72. 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/TCACP1614230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c79058da7a593e63de777b83df717454a98781bebd9126312142b1b2e8dab7b. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:46Z), 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/TCACP1614236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757fb7016871698a7c3a4e74ea8f5938284bb3c21fdecfb00d32e2f22f08e981. 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/TCACP1614268.