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 0x964c36e3297338166aeb8f6ea5133a7c964b50f38e68d470fe8536b5dea06a6f. 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/ce86336c-eefe-4460-a2ab-d73b3eb29645.json and https://artists.proofprofile.net/proofs/artist/ce86336c-eefe-4460-a2ab-d73b3eb29645.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 0xedc069055e3d4d2bb08330136835af121911d8cc3ffce2514aa6dc3acbb8c6b4. 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/NLH3Q1900483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacaed2a6568cbee62360dc3945134aabdf6a92cca96f3e6dba8af202f1b4e3c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:17:00Z), 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/NLH3Q2000622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3583741f5b1fc9e03f26a1568960442d8e6a0fe9783a498f0211a31e340b9ee0. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/NLH3Q2000649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846a8b9a415a66d0c538b7de803572216eb7d12f0d482b59f6fa5ae06878b3e3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLH2L2000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d1a123667a0d6fe98ba93ec54e721034c3577ef3c66cc840ca2dc59f8a688c. 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/NLH3Q2000719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797eb08a9f045582557108de4822c191c96dfa4859bd0d602adb703b59195246. 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/NLH3Q2000737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6812756229bb87b564f8878935e1dce535033ef4feac13a1be656ceef5cd6e77. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:50:07Z), 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/NLH2L2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd498ec0b1ad1dbdb39155520196f19fb6be35ad6780453bdf0a846640cb626e9. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NLH3Q2100884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6132b039cc7fd0aa07993b19ae0865f8e998306a4e45c73f083a5ad7825087fa. 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/NLH3Q2100921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67120c23d24779f8e62423adc548727894ee16be02e5526d9a676eeacd16cfde. 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/NLH3Q2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2e26c691b6a428dfa0629d7052848820b2c130f7176bddc1ce8af454ee4327. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLH3Q2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66234a50e73ebad010b48cd2b3653e44e71762270a33f466ca6a0b14e42f179e. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/NLH3Q2300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad586750e25f145e4a01d29a8f56170d344d1fb0081f2f96596c1cf11ccc00c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/NLH2L2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb155c236e80f3fc266b23e74477cac413e4754ad24ac710b70f6daeec9bbe5fd. 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/NLE802200268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb155c236e80f3fc266b23e74477cac413e4754ad24ac710b70f6daeec9bbe5fd. 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/NLE802200268.