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 0x162eebffa936ca45bc5e11b29b19f71c35cc152c0bc5ddaba4f85be23d250b88. 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/69566ccf-c083-4e5b-8dc6-e9ebdb9af8ef.json and https://artists.proofprofile.net/proofs/artist/69566ccf-c083-4e5b-8dc6-e9ebdb9af8ef.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 0x5653586c203ca37d89adc49afe0bba2a58d27ec9b54d68fdfbc9d6a9e9af6b85. 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/QZES92138411.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182f08e235f8e91fe9868b6ced490b81479bd924d73dadfd83f2f4070d5cd621. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZNWS2139961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846fa41e36430c5899a93595e8354aaf7022deb2a5f266ef6bd4876cc1469378. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA82370739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db359746572bcb462e4da4530e156a14a7c59037b96f08fa6880609f442b80d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTAW2367453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dd347b28867b98400233b48a71b94330fc3d6838c2bd868820e64cc0435beb. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHNB2484625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7602edfe2d53133b336bb17fa6107e3095ac55a118b8162caaa13be9febc19. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:21:45Z), 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/QZHNA2508398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bb8dd5880d19361604d22e058317bfee7eb152b1e94b98403cbd243fe762ff. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZHNB2590938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71df549fc9cc8db32bdc7aa68ffff9593d67134ed40ac93f3eaaee2d398a7e4f. 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/QZNWV2588257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9143ca94747d6d708f93c3fbe5e8dbedfd34e1a4fca1378b3067e25001c45ec6. 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/QZWFS2562542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e01ec063e4e2d9f2db5f7f317830744caa5f93e3ce4bfa64ae817098cb84cf9. 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/QZZ772509547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66891ac39f143d33ae21899ab2e6d506a7cf19af97340e7cd700dcb9dc23aa0. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ772511357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79485189f3941ce0cf29a6b1379ace0c346bf558fc03090623cbcce7d313f820. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:41Z), 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/QZZ772511365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2c2deb8d357d1739354678f91a73f834e08f2f7d28869d00edcc277d2ac209. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ772511371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1634f803f60945402c3ae730c0c5aec10db954747b85dbb467699da47f6e023. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:55:11Z), 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/QT6E52523240.