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 0x7791ea27275c69152ccf649f889449c23bca4c9725cd35e0029e4e28f4594398. 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/9b37b16c-a147-4b0c-82b8-f2896da685b5.json and https://artists.proofprofile.net/proofs/artist/9b37b16c-a147-4b0c-82b8-f2896da685b5.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 0xc30d8d134af28f925f26bc9de2661544a88db5ca01d6d916054051ed414224c6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:20:44Z), 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/QZTAS2392574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87423b9dc1583777146fa7175062bf64616dc38fba3cb8ac6f9dcdb26be153e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAS2392582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e3d8265fecf377caea55df228d1fc92cbae37af0a109e4af6429ab513addf5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZTAZ2391665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd487258ad94883837534fad86ff0076c071dc3681f02754825d5625043b1e988. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZWFJ2340971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bdcbecbe930cd7cc68347bff8bf26321ef81cc4cb571b2060f3fac5d66efd5. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/QZWFJ2340972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cd50707163d76d18a873e5e63a3fe775575ff037452331d81bc03110ba3da6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFJ2340973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339cd611d9e3579b32ba0dc41103123b5bb118f46069c282c7d2f6a29105a69c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFJ2340975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e4a9bb3f269d16a9002183371e1f501ef84c8e00726643ec5ea7b79dea13a7. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFJ2340977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fac73015e570674220ef4ac7e25bf2f4e177eeed4e79edc66c7e784c60c3c88. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFJ2340978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b579fc8732d4ea8e4901eccbb342396425dfcb1f11363f2cb6515584821a41. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZMER2422754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf013538f8bf3bbb4f71636d9667b12be83399ee33ebda9e11419c4dbb827643. 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/QZMER2422755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e68cd1bbdd17819cd4b00098135533cb68c2ebc71827fbcfd9c2e91c2e3863d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZMER2422756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcc75569b7e7ffb89510b59c4b51a297175a870c36b7b02391adaa65a4dcd04. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTBB2490979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d1244428e10893cc259927fead6cd5423b9fd571cd32166a93aaa42d744689. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBB2490984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cc354c184e02e0f62a494386065638ef55d55ec9438e213ec9b67438638501. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFK2431831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc290774ff422d26e636735614b86d106bcf87ebb19f2d63b58851f9331e576. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZWFT2430591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f871b9e0e5e4f0092998e0e7099cae9087a2aafad4f35d2d796d06faac1cb1d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QT3EZ2403752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf350dd388bc93c9d8a0d2cce547a02cef596067911926393fd8f2047fff0656c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3EZ2403753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d18e23bfdeef86c8a2a1ea3e140d0802d1bb89dc24847b75f300a9dc2b2ae4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3EZ2403754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27376405ff8b8dc1279f6fa8e6f3424cf5e554f0a72c9b5c089491f38620df4a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA82523243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f647eb590d17bf1cbf6b3c765f2b36b31b0be259789d39e7f26f8fce439e0b. 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/QZHNA2546903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88e538fc08aeb2a753b3a1ca91ed4533a6f6da132d2e0341cfe9d33e0d486e4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZMEQ2580163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcff2f877bfe7f7388281fb78adf85c660291619336897949eb02adc3f78673e. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAU2541638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e093006df6f3fdf2a86ec55c164adb26a5ce91d223913afbf7c4d38baaadc5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTAU2541640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3999425d57456fa05a61b1116dd04b1bf45df2d802a3cb1a29c04810cce41270. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:37Z), 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/QZTAU2541642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb651276453714f950110ba0f7287c47abe5e1815593fb4232b595aa7df9c1e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ792527186.