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 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 0x058a3ef9d284378d61e1da12e128517e745cdac55a7037dc03c2b446d690dcbc. 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/79039aa7-d9da-4827-bbfe-12347852f36a.json and https://artists.proofprofile.net/proofs/artist/79039aa7-d9da-4827-bbfe-12347852f36a.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 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 0xd242cac0cdbaf8afb7ee8529386246087b0e9ee45006e0753011a537e22a65e9. 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/USHM81622194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc002bdba0e1b023396643f022363b85923b20993378f219c93d53de05c98d69. 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/USHM81622195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e856934feaf2260d0c8cd1b9f3f43d7e5fb041d663e632e65293bb1d8f5ae3e. 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/USHM81622196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2120ddf063374bea6e52e7abff35aaf1aa5bfea91a6a7586bb1b0cb1c95086. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USHM81622197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f0a63d0598fba1cae1a2cb8dce3b6f10572877643349f9c602bbc0359cb709. 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/USHM81622198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860247a628b2aa00014845591531279277fb13d6c0619278d7336d8b7a1d7b39. 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/USHM81622199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ce371cc1627038a2bd3130f7b65f755acf1074d8cf3c270d37f4abacc8544c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHM81622200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f0284ddd48a73bfd6c2908f8eefce9c4d8101c966534783a500199dfbbc70b. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM81622201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127ffead30b14faa34fec967484e749a370234a7212adabc45e597931d5c4b40. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USHM81622202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd9da0c3177198dc0341726b3e248eaa5e9b0dc861c7601b8b4662b27d469c0. 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/USHM81622203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa765dc7b0a2a66ec453b8bdee68dc3f22dbbe75c747b914f1dd1b7198b8dfc8. 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/USHM81622204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0e84b4ea697f8ef9833729b982d4ea1079029c1255540abdbf8e1b28fb19df. 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/USHM81622205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecff9726c08db4f2e7b87d060a0085d1d47c3a47bf2ab63263daa20cfd557507. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USHM81622206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bde0024424a5a08229de123cb5a3321469e9e5f74af81db14d962cc92dada87. 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/USHM81622207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac6da584250e87525dea315626b5a112ae307f644214a9acb82c5c80b8848df. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM81622208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9457a28d932cc58a551496a019f5625c2601e5a31b7a65cc9543a4454a05afdb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM81622209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6abfeca93e460413f8a269864dda7b83983b4c0870909cbb0c776fa9f90aff. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHM81622210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289f5714e6fb17f87231901ed99304b46c73e3760acb3d08309ea55f894525aa. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QM6XS2510336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fc526470c29b17ad4f1b0a740059808c9cb19a875ae7d8829dda4b0cf82153. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QM6XS2510337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d48efa5414f47ad112598fa1d4d1472a2db364292a6095f25dbf4b18c7b55b1. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QM6XS2510406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fb424fe5414d2c15e0b0822fc81ad1fc741c55bbcb4a754da8d4b23bf9ad26. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBAJE6300382.