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 0x7d49d465eb6459d84c4c8a70910ecb09c207378946456cf4a5dab0fb85455d20. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7204d97e-1970-4551-8a27-b139e2d0e641.json and https://artists.proofprofile.net/proofs/artist/7204d97e-1970-4551-8a27-b139e2d0e641.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 0x5d145723b2ff3b873172e912926a5ae9c777b3fa19159d5e8cf34e397defadac. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NL2QC2100959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517673e14f84e2db4364ad77f106a8b5a5c6d9b296ce9d04b3e18e1d29125c8d. 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/USA2P2135843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44de63b16f7a1ec1337f921af3c375d42ad045bea5215ebe8a925df31bf0a5e. 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/USA2P2407584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacd3bab3e9009ad9194e19017641b5ef7fde5b732430fa18ce2d6464b642788. 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/NLRD52119867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a39bc377b6a0892c8d02a92c1024feb3f7b861062d84c5d8e0242736c8f4482. 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/USA2P2210067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfb2385528d6681f1dda1f0fed1f8f2ceb8dff37219c0dd6365df09b1a9d96e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NL2VN2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2702632a2bfa74af5dac2a65fb0f29a0027bdae42ec4f84bf2001bb6df1111ae. 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/USA2P2111932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6585791281bc8e0c205edf6397c1ab883619fddbfc1e7319e2933bd2a2b4a836. 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/GBSMU8980668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89da7aad523de187b09131f0d5b7a6ee97f76ab7878e65186cad41b3fe3ba7f0. 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/QZMHM2057752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3eb78573455e87a9de001c29d31c86b6459dd524749642d55aebdc0ebba10d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLE8P2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b1d91ed4c169cd20a6959f53bf5d1ed7f81224becccd9dfb3aef0122878d99. 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/GX5MY2207830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae65fd5a631ef9a5f33fe06cdd63e008f64ae3ed02710a5cfee123c538778969. 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/GBSMU7304986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf947bf5a118b0a61cda6c0a3c16bcb5e9357abf2b5314eae5edc5f383ca5dd72. 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/GX4R52272696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ce16ac81400329cd6ca7e88ea7666a75d5111fcf5433fc9f20d60047744722. 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/CAWK51909100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0aa1b56053b265b4d2493cba7098c84761458862323f6f6215ce04a7d71d77. 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/GBSMU6156103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca62bdf77193d7e6bfc0557448a61d246a557d07e43d2499aa98d2b88e3e10b. 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/QM24S1905780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e64c21afd162194ab18dd48dd3631668044b86c0021192d2b659eb8020ac1c. 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/BEIW12300485.