thumb|350 px|Taxonomy of a simple interrupt In digital computers, an interrupt is a request for the processor to interrupt currently executing code (when permitted), so that the event can be processe
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 0xb9bf34c59451cdae9188ddd5c13d3519c8ddb50bba9008496dadfcd314b9d795. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df0397b9-c5bd-4f90-b11f-42648f30ae75.json and https://artists.proofprofile.net/proofs/artist/df0397b9-c5bd-4f90-b11f-42648f30ae75.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 0xe40dca1f8951619d124f92e19a0da7c214c1e0f8c3fb9ccd44004dc7d45e71f9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBF6S1700033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b43e4d06fca88665b3fd5d8ea74c7d060c4ecf16edc1f3c64ba8146f77d5364. 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/GB5TW1600171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd098a2c0115cbb22d7181797e37390aab9e1ee1356a1ee5c1247ccb0351076f. 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/GB5TW1600174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e313ce0b290498ed81d5f658b9057d4e8251d6603b0c4a467a749bbcd0c58b. 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/GB5TW1600175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabb114cb9f5f569c06c7f421805391a0e2cae54615a53013c90f79331ca2c6f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GB5TW1600169.
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 0x3286cdab7b6fd2634e93d656f67a29b8e8b0c39bb5f04b9121c39bf768542db1. 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/GB5TW1600173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c7055c88c4907ee8696ba69c80169ae8c5d51203edc650d226603d109fb1a5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6541910332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb621384c7b019b72c792abf134d7c2f4300377672ebc50d5e26d67df4bcb600e. 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/GBXWN2000370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b84faa97dc70be4ecc0ee7c1b8f5552de30a0b9bf5e657bf01a52ccb7285a39. 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/GBXWN2000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638cd3d5ab20d30a3545c1e31772cb44d5d9b8b6099a6d4d8f1655b2ae43a478. 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/GBXWN2000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ed9077aefa2ef30abd61c5ceaccb6c08405290f68019d286d18544089a51ef. 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/GBXWN2000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c55d7f7dc43ae8be312007d3b1e34b07ac8ff40abdfe362ed6e976b6d6e52dc. 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/GBXWN2000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68082a836c11f3c2a76a167177c8a308581040b1a7515ca2c68cf0b0805e9f3. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBXWN2000230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3058e9afb1bda4490714ba10f94c8ef9bd2e5779768140aca8a89ec793eed478. 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/GBXWN2000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b591ec7c510c078c8c6a478c7114f71562d10d5e0dc866f52fd95cd274afaf. 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/GBXWN2000280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f557c99d3a6a6c056ab382935daf9ac4f60f636d3427cd60bd0b957f3e03d2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBXWN1900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10260a8792b0db3913288c0673dd2aab070287ced408d164aefcd81c308db12c. 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/GBXWN1800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51508042a96c11a63ee6e180479e16da517dcf3124f7b745aa07137a3f6ec644. 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/GBXWN1600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c9d7d989c54c99fd1d01a615a0c87328ebdadbc2b8b25445cda4efe2f7e1c7. 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/GB8KE1953626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffbf17f5ba776ecfc57da8537c387e16db5251364497d5fdbb6caa6906b5637. 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/GB8KE1953629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ad100c4629a8a901ea216db384b4ba997f619ab0bdf2ccf839c5413c7a4362. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMKKH2000702.