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 0xcfe61522a840183854272dda7a9e4ad213c0020731d29ec360a5e8825bd7e1ab. 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/45147e21-a479-4fa8-98f7-fc82c8728c0b.json and https://artists.proofprofile.net/proofs/artist/45147e21-a479-4fa8-98f7-fc82c8728c0b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hagakure / Golden Age / Baccarat / Letanía / Yangtsé / Telúrico / Calar / Cabaña de Caramelos (Mixtape)
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 0x4d9dec3bed20d8d87b3e743b54a73cbc6f558325f47a7989a5af193ed0d2c140. 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/BK4DA2462293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea3361571069dff2cd2dff5aee52db7e3073220d31339b8bcaae19074df7187. 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/QZW9K2291807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f5079692beec317965a9c38aa55bc06fbba44681fa543be270ec3fd41d1270. 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/BK4DA2204637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6f475378629364eddf97f28df37e6cf18b9289479b5ed60f33074b4a6a0a26. 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/QZNJY2153524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99981a1da0af79bd74e554f07d27004e4310f9e11f0c977f673f246dbb28bcab. 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/QZNJZ2337537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c465f63b344e3ca6ff35d3b7677fa4e18983d4bcd6fd462ca31027c1b606bc. 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/QZNJZ2337542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb35d9938163dbf2d433c283bcd086d9603505ac66a468b08d13a3de7ee27bb. 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/TCAGB2294279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a23e6a1c9ec6cb91c6cf2fc669c3e81c2588912b0086670b39bc497386e399. 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/TCAGB2294302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9efc526dea5ab0bcf14d7584790103dfb8585b08cfca62d112b6ada5445cba0. 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/BK4DA2401391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fbbea5a48ec4422710302a2f4039f1fd1ef3a2f627cb1d28f583bc2eaf5c27. 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/BK4DA2321490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c974628b6e4c8dbb030ff4a0ea5b0bd6d34486ca23cb540b45ce02dd70d1c82. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZGLS2398148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0a82923fb6f9c2022981b72d9bc7338f92b9638dbe1e6e49c923d44bba2d90. 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/TCAFP2113389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66aa9dce68542771bb769cb4ff601a44fc07d497a62edbd51ca274fbb411767e. 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/US7VG2197465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fd9579b7ce4e1a9bced15c079d8e6bc1a52d0ff1e20c91f5fff2f73e5f9a25. 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/US7VG2037579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35843edf57c2e6622a1965c7c943889b4ddf8821ecf8341343ddc448e195eb60. 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/QZ5AB2098824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbf7eb09f8e5113d388df5ee21c894edad83d8ddbfa0a6f00b41ac50bee05af. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZW9L2454276.