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 0x3cdb383d4e44a9e9e20619901c1d07a838989a6ea906f64cdd5760e1e31b0cb4. 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/ddae7641-c075-4f9a-9999-5d650a32c816.json and https://artists.proofprofile.net/proofs/artist/ddae7641-c075-4f9a-9999-5d650a32c816.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 0xfa3573da8e9b96c9d0d34b4acd3a75bcab13aa6dea56e381ae3dc20d40a990e4. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/FR9W11214167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd08872d849b33fde9ad969acf8e47b33a2a6ab8df35b01ebf9f8c4ef840a5f6. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:35:03Z), 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/CH3131613060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bc75206a7d6ea0687031ca050a1d3fa1ccfd271ed1d108fbc668d2ec5a181b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CH3131613106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7241fd714a72250e650afe202f3a666888eeba350e4516b67860a719d08d1f. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/CH3131613107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ae0af1a438cac8e9d1a770df1635d0a443c8ed295f68170243083eecd6fc5a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/CH3131613320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b84f721918225ce1455c5321d6d2842f0db92cd7c34f11898095765e9c72c1. 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/CH3131713374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed3adad0dcf2c475b34198ff29411773cae7f304806fa140708f1c06c60d300. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:32:25Z), 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/CH3131713483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3daf16116f15bdfa99c32165c5f173c820774c1c320d1b4b4f2c935c6d8f853. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH3131813988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc88a3acf6b2ae4aa28f7dd31099adc57f9d26bff4390f1f4e651ceb694155. 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/UST8K1898637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bbbe1c8acf031da9e28ce06d8b4e8919646ca136cae86767821edafc79ce2f. 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/CH3131915111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34887e61dbb4b43a3a6deb4adc59fb9b1ef66cb9bc641d05c30eacf13f08807. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH3132420018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7391fb61d54accd483058f922e72a2e0dd679ca10f325af62ed4b57b2b0998fe. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/CH3132420019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed3adad0dcf2c475b34198ff29411773cae7f304806fa140708f1c06c60d300. 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/CH3131713483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1306f907142a1a78b74e022ca4919242a848566f908b011e68e78a88aa16d43d. 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/CAN111400471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1f70ce95e079ec66f7b6a13aa669a28bf4005462ff931d67ed69f464969ee9. 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/CAN111500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e3682c2bf39d4b2e4158a7c27b65a884129a9322eb757ef90980a2748b5b58. 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/NLF711505095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b51ffb44ecc4f8bbbd43827d6e1a1710459747942cd61783f01a016c92a3f1. 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/NLF711401871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bd300164269e9afc09866dd67997c8762fb20e7517282878d47f85ca87cdc6. 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/NLS241501898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f9577c7434b766eb97e4508488c12399227504f0b8e93269b584d63ee36b45. 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/NLF711704452.