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 0xd115534d0f1f855334b667040419014ff3e4a7f931fd809913fcd095c41484bc. 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/b10842c5-e678-4bba-bd5b-3a3bfb2b3c9f.json and https://artists.proofprofile.net/proofs/artist/b10842c5-e678-4bba-bd5b-3a3bfb2b3c9f.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 0x9a1d4e7879377bfdb1520c22b035798b28741ded3d487994bf3ef3d5f45ffddd. 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/QZES62275512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9ee661a247aac73702d49a3bbd0ba0859b6bc530bfe6019d89d694c15a6988. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHN72235492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f054a73b4458dcdd6f64f9a9056b36d1324a6645214d5cd6a2f5e437467f1f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZB4J1896566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92467d8d62e2559e74834f89a2adf64063cde9fe0b447a8edec251cf05a1f097. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZRP42281839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c76537fa760f3a0ba202cc8e79cd7a2c548820e3c805e47989ebabee86fcc8b. 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/QZHNA2308897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc52046bc7027899a806552758bd5ab92e0672cc03c6b082f71e15d7050398ec. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHNA2308898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829bfa05c6af3e76082b252e40ae2eacda64813282b9ffb69a5e244cec77ec72. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZHN42302359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff388329b64d52f1572bc746debd836deab5a8062dad4073fe0898145c2c1bd1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN72366210.
Sun Eater (Neo Soul Electric Guitar Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7a2d9e8555e5bab08a29262371a2dc9ec96cd8373cc2152d0c47a6cc92de12. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZES52443315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50fce4a2280dfa2c8e778ce4b2068888f44cc4276a72ea11efc2e5ed4e2384a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWQ2427607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e56669ebcb33b646f1c95309634421fb9fa3715f8c2ddf822099f597f6e6ed. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFQ2324057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be189396be238326b60ec4b6fae5cc8355c27e2ce99f7a6dc91632156dc1523. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SE5BU2510942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a1a895f9add9784def773256a79698e824abda87276714d90b032fb90243fd. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SE5BU2563319.