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 0xe548c9296d837f925b1eaa8ccb4048701811d132bb4a95843fe192683283931f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0b507d9-40a5-49e8-89e6-d8c40f5b6c82.json and https://artists.proofprofile.net/proofs/artist/f0b507d9-40a5-49e8-89e6-d8c40f5b6c82.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 0xdf2663ae5ab7c84bc4b30a48484dacad3ebae444ed1b561f1ae55c2a100248f7. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/FR6V81453294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bb0781d7fb37666e020884e3c097e2864faf29ba83cb3d1b4a97dfc8928949. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR6V81453300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa292a4ee44c3864b2256979073fb9ca65a28f30d23c124f40e2bf97b37a38e6e. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/FR6V81453301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe149515641ee56dbaae55a2ef4a10b70d14e682e1f4a2dff735cb21cf44b093d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FR6V81453306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9c8f7e19679b4c3683e537e9c7270d96410b5dbf0fed623c9f153a5f86cdbe. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR6V81453312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ad6b80d83c7daf9152034a94d8ab7b7a0dbed66da428d1d0e815bde08b76a4. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/FR6V81796119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6deefaec1ea9f902fc0a55e37fa2f0423212c3b0c54cf56b5b2ea95bb196053. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR6V81808211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920a9c1f4ef038450b31d9e364846382b1b32c215c11820b1477539ad78dd1d8. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/FR6V81808212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f2d6795b75b2d79fc66fdd4ded12706bd5cb0383433f3b2d87b295f8c11e60. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR6V81808213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6149267ea28e4ad3294551820a36d37aeeb964108368eaaa1161e0cf439f3cac. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR6V81808218.
Chwayakh Mn Ard Meknes / شويخ من أرض مكناس
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360083cade188cb2ed492cc8c7828a66f4a2080ffb1bf2ce88c5a5e0abe8d7e7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/UKR6V2013741.
Ma andi zhar ya hbabi / ما عندي زهر يا حبيبي
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a243a6da24e1d2743f3ca8083be52c12f83c2e817d29b804f9cb70ce172b89a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKR6V2112409.