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 0xdc28713abb583385ee4997dbf84dde92fc012de52dc1fcb25a6f0b50d788aba7. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4440cd3f-7d57-4e09-8a8a-0ee46f95db22.json and https://artists.proofprofile.net/proofs/artist/4440cd3f-7d57-4e09-8a8a-0ee46f95db22.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 0x0ad7c6152d48713a8b2311dfe8266d944ec21f8f46af9ea39d00435c3e40721e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/PLA391322001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8153be98eac6a090d636033140eb135493c8b6cedd7d5f0bd7fa3bdf56fb1b8. 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/PLA391322002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f3eedd765fa53fb79ef4192978b7cf1f0286f9261efbea36056fdcd3876597. 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/PLA391322003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7eeeae26ce33831ce14985c100dc06f0aeb14767767931e9c5d160251f0317. 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/PLA391322004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857e536440e21059761c1df1daef77057077d48202870ca98a3c92554dc309b1. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/PLA391322005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506541b3900428b48cbf28f1d9bbe93af97bca0ddb50a4bf1c6c5af4b69bf3cf. 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/PLA391322006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92306721e96ee2b7bb003fc4518512a8a2f5893cdc62091c79b5a9ad2724a8d8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PLA391322007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf759b047bbea8b70ca6c5ad090f1cfcee0dd4fef0744a2d5968822775bcffcd4. 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/PLA391322008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af42c5df91d7a913a8c0ddcc00dec482ef206105d023cba6309b7845ecf46e2. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/PLA391322009.
Jeszcze jeden mazur dzisiaj (Ostatni mazur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14a10085f224fd737223a67c3b210a748fa019e55ca25fe753689ea89c0f876. 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/PLA391322010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf6019b00655273a18ab6d3643e4bd1ff14e2442d4a10a29959694b95c5500c. 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/PLA391322011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5556fcdf43e9383280784dd0f2291966037a96779a05229baad3c89faabda2c9. 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/PLA391322012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761192205bab15f29f3945a81bc0890fdd4797ed1b5e17767635fa4095545da0. 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/PLA391322013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc2c13aaface9d120f9fbb7cf01a109433107be4cbe27f6edbdb5a766de0004. 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/PLA391322014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4116bc6b8ef198c69f318cd278c3259702ce98f3b2408216ed823ebaf6bfbfd4. 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/PLA391322015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353e7ed2fe327475b5e8966df99ba8922447a9fea95ea5e8ef9f8f2950ff7190. 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/PLA391322016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67723f89ff287237f1331ca817ae249db5a73b8a116e8c92af148fda008733fd. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/PLA391322019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7582099689f0a4c61946b25468337577ec451335eb3232546ab8f075b173889a. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/PLA391322020.