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 0xf9c5fc191c4deb8ca83dad09e7d774d03424a4e39f06121f453790cefd21b9f9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eab171d6-40f3-4e7e-9ba8-f823dbf2e3a0.json and https://artists.proofprofile.net/proofs/artist/eab171d6-40f3-4e7e-9ba8-f823dbf2e3a0.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 0x80bc89e9905f27569422e1d6cd5dd53e8cc3e337a1d496671668080542a96942. 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/QMEU31911699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55a9b767faae462c1bd7a8f941bc367f5aaadbe4cd92b9132b9d9e0eafc41a4. 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/QMEU31911701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a8026a33410df4d2d3b2c432fed31fee9869be9b104831f84564cc23ba3dbd. 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/QMEU31911709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d7d2447bedb6662f38fc7cbdc88c7879992e138d1e714276752bc78aa54338. 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/QMEU31911711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ce743ee149b0c19efe0dcf7db7d1e33fccee0a60787a7c86053736273a07ad. 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/QMEU31911717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464832a41531580859a54b63dde5fc228e385f134326b1d32a46741319c57f47. 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/USDAA1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cecdb73301db2ac6fb86f8f3799ab845f408a8ea99bc98b0c6bf1dbc421bed. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMEU31911697.
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 0x68ec8e2ac51f5981cdc0115e1fcbcaa10860016c23fa58db3a01f59318ca2393. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMEU31911703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79410bb91bb3a7db111177133a3870219d32a36ea741182362424bbce5fd6fbc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMEU31911705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b539c4af1167429262536b404dd3a42e3afc24c5696e2c13baa5808e3a14dd. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMEU31911707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a984b063326020493f1e4572a468217c2f63a36fd0e85490dbba53db553eb94. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMEU31911715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d9b15cd2e5521a21e808bfaf75469edcaa550807112731faf39adb4c3f1e04. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QMEU31911721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73498711cc30109b06573af5b5a8886e42463fc0b9c67b4aaa6d9239870e6f76. 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/QMEU31911723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77aadcea3733dd3644bb31bd9f63be159bd3b75d8b0db1781eb2da902469c36e. 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/QZ28R1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fe279e6c83cab86a07baeb171e2bf2bbfe15f85481c2977d759816781b6928. 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/CA5KR2151868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfda1cd59a3e5848f1c90ebea5216cbe2d224f9354cca6592ab3b6484fc459d. 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/QMEU32118474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b3692e65dbbc73a1662e5a1e74355e4fd05364ebf06a88f5c07eb37de6b34e. 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/QZDED1800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d747d5828f1f814329ffdb9344ced950cf740e2e94d9c92bec4028a9ee53a5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTBB2351337.