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 0xc845876f61f941d3a97cbe7babd021e4eb3a99f892401e00fd2c78e5aad5ecd8. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/329c8873-0850-462d-800d-79786b36c3f6.json and https://artists.proofprofile.net/proofs/artist/329c8873-0850-462d-800d-79786b36c3f6.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 0x6a98450980813ad9e1b33adc9d12930bc38003dc12dfdfcff3e690438848d43a. 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/DEPI82401995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce7c2e9931ae258d3ba303be1486062c7f2cdc6cc19a42502deac5c6695d306. 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/DEPI82401996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b26ae99086f108fba9984d1f10f59e42d69ab9fbed0757b0b85292e39b69af. 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/DEPI82401998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93017df2f476a1ce6d11f71fddcc5250970b28e936af663d6ce4e7f2d9ac7be4. 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/DEPI82402002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c33ecf53ad166082cdbd5653e78109baf195c44017e255d7497cca235772de. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEPI82402003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137aed8a0d91b0f6cd138354052b44b7b9eeeb9d7d67441780f55918a6a0d7b7. 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/DEPI82402004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0cca94751c718ecfb2466eecfa5511d68dbf77723b3a25943b8f843e45bf9d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEPI82402001.
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 0x34788792aa351b2869ed481ac9cac7f3f44b55e627f88a7dd66556e19914a9a6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEAR41712794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86826aa0821fc4ed9ce74a2e618f9baccf62cf1790686cb750233dae0ee0f22. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEAR41712795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ced6c88d0807f0dedbbef398b5b0b40dda18e008748bdf14714851f2bb5efa. 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/DEAR41712797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd377b3fa5bdf7556d6728b21e89cc3c04df10f945d6f67fb6fd114b0b62d2610. 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/DEAR41712798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792cc9740ca4b4cb3cea112439b04f35ea87db06dd80523c5f804431cc764b3c. 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/DEAR41712799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dbb76ab56e3a9922c01980e6edfe7216bbe434d484c19785981b209b627dec. 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/DEAR41712811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7219123e2a3700b408e452ad3fda3e4a31bd99495d4db1f6f220e15d37eab8. 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/DEAR41885027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7601e81be53fb0868f6b005a03571f4a819e74576b1d99028e3ceddf9a2a9d. 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/DEAR41832184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac68fbb73d2d34f8e75ca5314fb0d10a14c43a3e217869a101b09c7d5778de08. 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/DEAR41858692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8034f31a2dc85ceb4f256b63f34125747a0a7bfcc9270a2a15ac9ca44fc7a66. 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/DEAR41867696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedce590322ac917edfee97efb3ffa18d97e905df25a4a52b75e6e1c7d4002861. 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/DEAR41852795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb2915236e9c7662ba2df17fdbc8e0e1f76b38e1d91fbd2a99fd57ba1fdf095. 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/DEAR41817241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68062b48377c0cff87b1b0ae36c288f091463533b0a10b503820299f7a1623ae. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEAR41820064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd35f9223eca02e4f38be8a3e3133ff6d1a8bcfe0c4f9d992525275a04dcceb. 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/DEAR41884928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990f4f7bbbc2ad7daae0ddef5afc80c3bcc2e84cd0d371943b9c55dcf93b0966. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEAR41854505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4202cbf2a6de03f93b8faf963c404499700e4085ab17e07a219889fb298cca. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DEAR41841860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e0587b5e44a4ac650e73397d9f9a8b22db0843787fdb99bce66473ddc40f9c. 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/DEPI82014896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19a02ad0ff68460a57b892548ed75d5ad8b4a6a017c5824c2761172ae573b9a. 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/DEPI82014897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925852a922896f7c342f5ca230cd02e6edb1a9604c4bc79d2d29546cbf0c99b0. 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/DEAR41211911.