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 0xb15746e5d23c86b98dcbced094922e3b0d942c67a955a56001dc25779ed53b28. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f12285d-b1fb-41a9-b6b7-2a03b4e2c7b8.json and https://artists.proofprofile.net/proofs/artist/8f12285d-b1fb-41a9-b6b7-2a03b4e2c7b8.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 0xb78d3cd43509f48f40ff30362f32ed70c3da7d6994cf30a02cdf49d66d30c432. 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/DGA0H2425499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7973f05dfa09c82f217d5aa564c9326e75ce8e43544857780b0b1ecfe268e506. 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/TWCC32207105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc01c468e8cc7e4b1f69cd39b2139142ecea1c9d1126fb1218deeb4631d2568. 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/TWCC32202488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d147da59edb7acf65de43b245583f08a91d215bf4bc4cd3d004507a19ee25a6. 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/TWCC32122315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50949dc77466416e058f37eb35522795ff7938794e23a43b2e3c242764449ab4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWCC32104750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a80ede5df713fb2a3e588f54eb47770b65f84b1e35063b56485511a658dc2e. 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/TWCC32008576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d75e55fa042317b94c74540c0ba3bf68e196b07c6c5a0cd5ed2513393b9c525. 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/TWA472008003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeb004d1855ef741e0b21ff0a274fb4a8303322eef5d5e3a31d6535dda4b582. 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/TWC611913801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5573c84d0b55a881e5413ec5e5f4b403c2dd6d2e7c39c005fa344bf54e62f7aa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWC611612101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a35b597384e478b1bb73558171301d11e4504230454efc7fcb43fb9eb874a2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWC611612002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7debb92812094f8fc7778f4e3f25ba4d7cecdf63f490c45ae9f38b544135db. 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/TWC611612003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574c5a9cc84b73e4d08dc69630bdca4109cd9ae7ca9f5440acaeb8e9c7873939. 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/TWC611612005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3007abd086813cecbd7e5964133eca12b091fb16cef391d2e6adcfb02685612c. 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/TWC611612006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb35b737cf323602f2db142dc6c4e914870d6f008d9c2b5998f0d700e17fd03. 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/TWC611612017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec7327f0c0961afd50cd5d0ce2315a668becbcf7ff8183fe5b0529891eed94a. 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/TWCC32002040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd52f201f0dd15d7c98b792871f5ce541c3ae4f201a53df35bdb999fd6217151. 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/TWCC32008316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b118234bc61c81c1ad3565676636a236a96bad5bb9d30d9d474c7acf02e0d4. 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/TWCC32205243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ccd547d28be575e29e7d488416b0bc95bcf84426f236a0195a81709dac97a5. 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/DGA0S2474455.