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 0xe87fa82f515d2419ed17a5d8950c52db6b78db07b9228ff622f26bbf46c14fdc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ead230c-8248-4aa7-bc11-35cce2c60cea.json and https://artists.proofprofile.net/proofs/artist/5ead230c-8248-4aa7-bc11-35cce2c60cea.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 0x1d336bef72235b2b716d23c5eda1f8bea63d01b6141ef2abc5ab1be270d44369. 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/FR2X41739806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ebb0c35cd91e0a74fafcb01a0622c7bbfed823ffe6f2ff009d789f307263d4. 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/FR2X41739805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a186c2c4b9225f3b80f451f84a40df1d5359974d658ff2b559daebb33f6114. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR2X41739809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3823487e2245329e91718e578fbcca8b6e566a76a7cc3faa82cfe631dccda30f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR2X41739810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee456f84e0c0b34f324a4bd23203a17d2248e3fd4404f5e9998804667c686d42. 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/FR2X41739804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda145c3a9939fad490848c9f8f82e67e4de64382cf335ecf95d30107d66dc5db. 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/FR2X41739803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab97524c4fb430690dfa194fbdeeaad52d524ea19dd9cb60d01448034172d9a. 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/FR2X41739814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b71b17f6bc6df4b65b184f01b9f546684fc0e2412617832679f12f7fad4729c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FR2X41739808.
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 0xb884bff30046730fbe0067b52ba0d4ba9eb452811837dcfc85d74e24f4e50d25. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR2X41739811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851fa46735513908be1468aaa116fefac747ffe5be09a0e74282157c62fe7693. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FR2X41739812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84aae7bd1431fd57eb8d3d3b4de4d3d7e6fd288dd3045f6fd9d2e5f7ad6bc718. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR2X41739813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0a6b9a3ebd5c00d2987e18ed076add1d6e50727750ffa3eb61f377537b3c48. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR2X41739815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6fb290282e33d735bb84bfc9da229397da7b4e406bc7a10768c77a62a106c2. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR2X41739816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661092727deed6945ec8b94b9a236bc832290b735bd100e7801f309bc8479465. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR2X41739817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d126252fb523829f9107569524f91bc74122292c440c967108abae6f96c7ba. 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/CA5KR1506766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397a529c61fdbfed5d24129cbc0ecdefef5c8e683473e0f5e002b761e0f9cf03. 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/CA5KR1506769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43339dc6262ba594da7807f767f49674ef9a2b2a9e8c88b9123b2a1267829721. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR1506773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2b9b7e91b8999137027117eaa09a7016525038242274d7176a6c70a118ea2a. 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/CA5KR1506777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcee57d52be9edf8cfea62f3cec59a0cec09965ad16d70165333a998e9dd0b0c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CA5KR1506775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1282794cd8fcb0c70899db261277f46f868d588e5b2328e1298dc9887b42f09a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CA5KR1506771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86e30ab09c9e9a9fdc8f613eed880236cc8a94cb7ed6196dcf395270c8fc7ac. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/CA5KR1506772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b44d3c9cd6cade5da908aa67b850522f4c3149c1b34a2a9c7f6a0dc4433bf4. 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/ESA012031985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e204185d99687ffcbc5e326a917ddc2ce68599b5d8b33d4bd15f582ab8b293a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ESA012031980.