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 0x51492e3945cbf82be7979bd31bf7c342ece02bcc20eb2f0d045e0c14c2904bf3. 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/018e99e8-a9bb-4662-b3a9-8e6632425d4e.json and https://artists.proofprofile.net/proofs/artist/018e99e8-a9bb-4662-b3a9-8e6632425d4e.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 0xc55c96b8f1769f6fd84a17940a2061d5a54756da36c80abd4111e0374d836d76. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNA2409192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4d52994d19334d2abf2396f0ba0234d85a538ee7d6c515b1dd08d5ea5e99f9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNA2409193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a340c64c072834452badb0af10b0525943c6b9f5088a07462f10e5ff33d8ad1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:06:29Z), 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/QZHNA2409194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f47a18a5feb6b0ca41f283b24fc83e29342c580c59fc5b6c24e12c199889ee. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNA2409195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab7be92a0e221d7a624c5c9b4856fec0f628e8d35a93c010f679d2d3a1d02a6. 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/QZHNA2409196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880451de23eb9d6a5b90c76ba968650960b959ced2dc38f1c3b2fa26f95c7eed. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHNA2409197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc643b770eec41a0596878a0fe626326daa3e057e64f702d580891838942914. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHNA2409198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf757019216cd84ced1306816bb360246d819540405dd5cb3c79c622a101ef74e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNA2409199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745e690a3b44b5b93e48a2319ef839d8a4d35e2e0ec79c85e94ceef0c4bbcb2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNA2409201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570e23e35d4419bf834742ed4d43df79fc69be2c31c76f87e5a783ee5f9dc238. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:51:27Z), 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/QZHNA2409202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622559b6116a51f094a28adc797f14cd44f7cec7ee64e2420586a83900b408b3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:14Z), 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/QZHNA2409203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4243ea151f567a192aa506fa92155df640c2d61555fe8801dbf957f4ea0c031. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHNA2409204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe097bb1cb37f9a5ba1e0c3064b0268b104484fda4d83cd07d997552c2a3217f. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZHNA2409205.