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 0x93aaf6150381ab51335971da78dc6aa0c531d995b98ec74b6f4aa20eac1560b3. 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/746830bd-15d6-49ca-b947-02e4828a1cb8.json and https://artists.proofprofile.net/proofs/artist/746830bd-15d6-49ca-b947-02e4828a1cb8.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 0x4e463d636f19379cb51416fd38907608385ebdaf7b15fa52eb578d060fa23b35. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ITZ682400552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad3fd82ddae0a927057a933c494b7c2ea432a15b3bcd5d7f4c035eff971ce66. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ITZ682400557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4307c2f4f50b4b181166270db4c8c5f486ffcf63805faf7002210399091d4c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:55:32Z), 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/ITZ682400562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14805fa2cce45450461195e6015345749098a9a1484fd938d87837ef0691609f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITZ682200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd059a4bcf7a968a3c5471c47b409db401459a405eb59245f294b162f3b4dd9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITZ682200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3f3d9a1577ad3f124e93691352dac3939b986c39dfe2cfa2c77c438d707102. 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/ITZ682200703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b89b9406a68ed66ea16a821deae144a566e53625ba989af6426194128c6632c. 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/ITZ682200704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8d8f51eca32372bfacca4cc3f75815dd8492e6e09582f6327ff34a90e155f4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITZ682200705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837972a52e14f51c4bebadecff76c563b5adb5f14db93cc75d5a81a5a748c83e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITZ682200706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662c7421e463ef023dc5f07f54de78bad4a8f7be40cd0a4d21b7c4dc7b86b127. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ITZ682200707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c52a9f9bc8234df0f09af0d8e2a2d9f51ec90e56df08618219ac90998cd4e3. 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/ITZ682200708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b6749ed30f5c10738ed4dee338a346a79eb50c6130207bc45080210cd5855e. 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/ITZ682200709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1408bda0522544dac26317e36a8b0f278614b82a9e9bb35dfe28dd669c1d2d. 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/ITZ682200710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fc91899d56ff058838fde47635e420ff8fc50f5a1999352583000fc7d66b01. 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/ITZ682200711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84bfe3b5c976d69f5f03a9d0da43cb45501fcbb77821a599cc57a58d76af2d4. 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/ITZ682200713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cb8f57b3ff1d9f94dd0cfedfff7c98e9b6b98dc3a71320022a518b852f947e. 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/ITZ682200712.
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 0x4aac9e78f026bfe8179e0ce31c78daaa446718a6895c80aa185b32b2677734c2. 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/ITZ682101901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad358b152db06f12edc70c239b0b45bdac93360a92aea8a8aa335cef44871b6a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ITZ682101902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8409089d6e37bb32df753995e5eeb2af28c9874c2a8576ef30cd256a19bc2f81. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ITZ682101904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0157186f79634dd7c9684c73b76f92ca8fe8bbda237b026b3f68ebca29785a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ITZ682101905.