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 0xa81f6be33bd6470f1f5003e4222283ac948530fdaf8206824f9e569e2dde377d. 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/f8034003-ea51-443d-b12e-dd7e7b2f1a5e.json and https://artists.proofprofile.net/proofs/artist/f8034003-ea51-443d-b12e-dd7e7b2f1a5e.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 0xc1256c4b8bf8703404088f58a4dd8d772a53f21e84476c1a5d8663998464b35d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ42182249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b40dbc3d113e08e021e7d097733b84230d8912c48820f5f6bf75ee3dcf3649. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTB42238188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b40dbc3d113e08e021e7d097733b84230d8912c48820f5f6bf75ee3dcf3649. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB42238188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26aedc6407b9572244ba765e9cf2f0c198edfcb0708a209bc1007c954c7c0a9f. 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/QZES52357888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5832333c0c4a43bc235fb14ec9281f30c818cecaa830b0a9d658bc5a296dde8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZHN52393779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5832333c0c4a43bc235fb14ec9281f30c818cecaa830b0a9d658bc5a296dde8. 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/QZHN52393779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5da61ae937cd3ad79d3dd5bc2effda009a043622a56ff20d647cf00679b982. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWBE2386981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec5381e20553a61670422e05602258080f0351534af77b3b746afb49a9c791d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWBE2394033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9616d19d1ae9ee172b488704a33f70b0a517735581de88d2e17d6d76043d94. 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/QZYHM2314367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325b921092d3d93615bd954974793c46638fd32c1e0794bf2fc0e7c80ab4e4ef. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZYHM2335237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a3b0a9d4e324dbb5c72e1599e14600950e1764ac08f203e1fe38b1ed5cfe22. 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/QZYHM2371703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b18ff15b2f982918af15d74ab71fa632b33923267a1b79609f05cbf6408663. 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/QZYHM2408251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd00aba16e34502c6c4855787d1861c637a682046c9dd47ec1a73c694d0dc01f. 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/BC2GV2300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6045b4a3ff573ed19de4e81313c6bb41489b35b4bc19e1a00959da19717dda4. 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/QZGLM2394423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc3915983b4e9c018870fedfc13ca448ff794982f3894b4b9a8dacd2370fc7b. 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/QZWBE2253034.
Tanjiro, Tokito, Mitsuri e Genya VS. Gyokko e Hantengu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7b40f640bda578d36c70152efefa81da7a88e17c3af976067cc4d6229a930a. 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/QZWBE2404920.
Flow Mexicano (feat. Mikezin, Greezy, ÉoDan & GRAV)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fdc737ea05821fbf48df018f5943aaf7a89dd1608aee6be86d65348f6b9e9e. 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/BC2GV2290003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf54b423aa0d9d49c63cf05d41d8aae1c3071800ef2c42d93554b09d98fb5270. 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/QZ5FN2352106.
Sukuna vs. Feiticeiros: Ciclo Amaldiçoado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152c7e2ee91538f072746028a511503f89ec04530fae8282167c12f2fab03062. 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/QZYHM2426256.