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 0x9f19f3f69f5e492860b7470b53d09aa0fa49f2084921dc665dbe69a2b4e27c60. 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/7be9043e-8c10-49f3-a93d-63c437898db6.json and https://artists.proofprofile.net/proofs/artist/7be9043e-8c10-49f3-a93d-63c437898db6.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 0x8c1a6846c8ba82db16a5158260b208cfc59b46802995ef959d097b5aa7ea97e0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKC992424622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673a697082ca46cb8be238dedf3e313c4a66123bdc22d73b5b206c1cb8d8cff3. 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/HKC992424753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd813a648838cac8f8d34cdbfc0ae6173b0649095c8b1731660a12c2990a54c7. 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/HKC992424922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94591d42930874eee144aca565a8f14e3aaff87e4a1f1673152659b40d788014. 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/HKC992424923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecc6612ffc36be8e390b989c56131d33d121a3f6311aa4ef27e916669fe9038. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HKC992424919.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d01af125ac077a46697bc97e8d79d3c831e2979dea81ae59c8dc17f1bc0e8a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKC992424921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa634f9ab93f7c0b1ad8d684a9be2bba39726529d1d2c230af96318d556e0e985. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKC992424924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6b1a70239aedde9b68c1f490fd23cd9a806b4148ccf8e81625e2f96419b031. 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/HKC992424585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5816c86d74edcd53007fe74fd2d3804f2bdd07d25276825dfc73597d7fc782c9. 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/FRX762491084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fb222b33c0ea2d6b0923a2935030903a8c8ae648b45188ccdb8c895a6692b0. 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/FRX452425929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218079c926f398d1ad2d38bc2d83a46ef7d22ad5fdfdaf91d1a50bb247f4bf8e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRX452425930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d68dc06760c6bc8db8fef376372fcba99c09529a29736f5471695df75d480af. 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/HKG732410483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a1d9a1d63db3bad3889ca1a5447827324dac59e1b0f8d94a5089ac5cce9950. 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/FRX452425959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be71c9be4eb88f0dd7938ba76bf89bff00f0b9df78dd1bf35bf3b506dad80a8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282415447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094baa6a8cb34a236703f28f294368694593c81d0813dbea9c170a27d39e6d71. 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/HKG731683033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629f539e1ddb810d1bf9c0544d86286287e0f3f56bb5ebeafd8bdbedf173d2fa. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/HKG731683032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a1a66a89d1d9daf61f08f7ab491c63851b02ff3ba843b64c9259a724ddcbfa. 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/HKG731681260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2b713430743ae178492a2c30f894361d0043efe07dc3198cf7c8079470f29a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HKG731681261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e871d596485cde0a35d8bbba1de7b192243cf62c68be44873f61538cac50a4. 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/HKC992325712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebdfadc5239492a949323777e14cb6fb1d111608ed7146689deebb8457fe8b3. 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/HKC992325591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abe1db17c4059c267d0a7f514b30165d75466e9395673f1f6ff6e6f604c9320. 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/HKC992325396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7630c1a4ddc434f6afc88a808a4422303ff675bf801ac2a5813c3f3964bce7eb. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/HKC992325126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9b16c9f273affd76138e9bc26f7c1ebce049975bdb758b338971eded568105. 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/HKC992324679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177b32c7996fc3fc301f89b893e7d6a1e5408d256ab9a7daba85b8c5b6a74b75. 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/HKC992324667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9c878fe3f0b0230324925cb7650c06337398fc5d717fab88aab8ab49b63dc3. 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/HKC992324642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db931d0324b0468f05d2efdf0b014c6f82922882541eeb83caad5caaf512357. 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/HKC992324102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae51a4c5a0eed3cba5e98a2a7312dcffd63d0fec85b05e4d102cb696806d842. 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/HKG732309756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1b9a52653877b5513701d1cf3ac3c2d52df72c8b68f230915f92275e62b295. 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/HKG732305338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa0de351f0626ec37eb4e56237204c4961702461663099074979cfc6ee785cf. 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/HKG732375027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ea8f9328b62897d01c2391e6034f2016d96df25b066789ab491223e6166c81. 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/DGA072254680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc062307be8d6bc78d6cbff9af4890fb22bbe9be0545cddcb731ebe45dd984ed0. 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/HKC992524406.