thumb|right|upright=1.3|SN 1994D (bright spot on the lower left), a Type Ia supernova within its host galaxy, NGC 4526 A supernova (: supernovae) is a powerful and luminous explosion of a star. A supe
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 0x6fbc91a6a23711012768633d300bd1d5fa9c841bb050ed2b283c0923a421abcd. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46424fe6-e1b3-41fe-ae7b-fc11ab407577.json and https://artists.proofprofile.net/proofs/artist/46424fe6-e1b3-41fe-ae7b-fc11ab407577.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 0xc9a58f582b2add410c02a400c39e01cea13073ac68efb2f476b0b4897766a335. 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/EEMN12100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf813ad71ae082b12bab5fef1bf2e1c654cb265a8ce1c3a8f6ad2720581f10ec. 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/EEMN12100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501199f19aabd26141a6f22265720eaaeecae9b49fd42cbba43ee9165a64bb06. 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/EEMN12100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0785f6ca8e280749a86986e48d80c73db49e54fcc10f3413e8507f93212fa9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/EEMN12100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32edc22542f4cd8c72c7e370576db39e99e0a254d98410758cac912d93cd760a. 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/EEMN12100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fef1d671b413a9583ea6cef4af88876f10642a2b62be2cc62f5a5a11d7436e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/EEMN12100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2506dded9d9d719db83b4d75cccb7d621ec29cefd4570b053f411224862fbd49. 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/EEMN12100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d569347238737a6738ee6731ce46a70fc67ac87f0cc85477f645cde2c2432d7. 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/EEMN11400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7706c8dd2e1dcb804fe3f67732a1b66c884827d8d6986dda3762d968bb915341. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/EEMN12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa0bbcd5e9536bea3dec7eb4d0541d6439b2146398df3699903755e2125ab10. 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/EEMN12200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5514bc74628474f0cff45591ffdf4d52372bd4f519e7954be8570bcf560bcc. 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/EEMN12100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04e49f862362af56d0a1d523f22b0f6f1c550c11871c434c28f3bc4ef4f1d94. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/EEMN12000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7c2711f29728de3a088ab5feb90e69cfbe4db87e080e841798bbe4f40425d1. 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/EECS10800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41851fa32e9356613db51f564e207d51f7b14a3bd5736402d63e29bae9a01c6d. 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/EECS10800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b5f270f048729f78cdff27e3aa3825215c2d27feb209d2bff26b73c6da8116. 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/EECS11400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa427c1dba851427d80b2f374f6df2ce9049620c061103f148c545e18e540d263. 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/EECS11400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b0b323123bdde91d772aa2dd411bebcdfa9aa625973b3240d6f74ad6c3a4c9. 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/EEMN12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf52f7eedb7d47ff481f26e6e481275d853532d8158197fa60a81125fa13cf5e. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/EEMN12300002.