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 0xe0b9ba5fae49ffd9920534d544ec354b8f3cfe3878f6af0c10f38165d6297432. 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/dd4988c8-0b36-4011-9ebe-1eacf765aec3.json and https://artists.proofprofile.net/proofs/artist/dd4988c8-0b36-4011-9ebe-1eacf765aec3.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 0x41cb97487d4e5caceebd7fed3ffd30261d5c199da66e5a3250b60153619a8682. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFH2501568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35f6dd51c9e0234fee960cd92bef6f803ff7a1e2772b52a04e15ee8fe818364. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFH2501569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ccf9a010aaa7fd2b346cd83b1632a820e621d7eb10c8e0a01a8cef0c2a94c9. 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/QZWFH2501570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dc2a2dee4b52918a92b8a27a92ed76127af728991594d447ca6c48dbb9d481. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFH2501571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e4edb27d4ba9ec068effd35aa0821a025450a7fbc84b6259e3e081cffb3138. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFH2501572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa522c5114c59342ebea6c2f9a2e981e688d9342cd612d68cdfba2508b1bf75ab. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFH2501574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf457feb00d1a345d4f7b0a45b8431312fa64ced851a6e6e65ad860e237dc32a7. 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/QZWFH2501575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575ab48fe61bb3f0f5b9f32e609c545586958c9d50e6b9c5b8f7d66f2db65a9d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFH2501576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694023e9a87ce3b0fb28bc641fb86d9be06a73aa5d505343707e7bbe52491046. 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/QZWFH2501577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ea84cf731c5060cd1b26e923f82e0c29c64dac67c58bfcb45ab919b4ef869b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFH2501578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38b1da3f2abd6f6cac7b19bd5265cef5dd0224bfc265e258d81a5cfb4c3c312. 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/QZWFH2501579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb0de648d3b70ba740c9eeb0d7b7fea8b4ecdfb95c19f840e9ea95a3cf0af6e. 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/QZWFH2501580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ada3bd6548866f2734abdeb552cc9a8b514dc299d14b19fd2d07117601f5c1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFH2501581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a047286a7804a6883cef8c2fe38e1f86dba319d4777eadb0aa40b2008966ef. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFH2501582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717dbe65fdf47669432be8b0a3f80a788675fdedbd86e80374e239051206745e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZWFH2501583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbf9162abefe71ac6e9647960fe8a1b4ffbc903c102a6d0a87012b8a55e6d54. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFH2501584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752210e3edcb8caa00ee694343510873347c49f244e17fcaacf0118d63fd8822. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFH2501585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ec151305ceaf03cfd69f59ecc6378be13faba17553ae0e6816f7b89d3b5746. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFJ2578457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6481f63219e7fb796f70301db4ca6dd5479dd3fd13d511ae1a48535b5ae022. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFJ2578458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc15c8c231faf954c7dd4e9c6fc2250c0c14e694947e8d64f5e296729db2d9fa. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFJ2578459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8504ce880413c59e4a8867a059922c973c426f43a5b623ffa4d6aebf91ce3af3. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZWFJ2578460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db188578cef91c9fc8516dacb182aeffeedff59a89daf26c62361f669e6fabe. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFJ2578461.