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 0x7a574548592d18b0ed48697b45dd5363bcbf0ca928e6333c76ed05e9de0be44c. 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/233f532e-f590-46cb-8fd1-9a204f6a0b21.json and https://artists.proofprofile.net/proofs/artist/233f532e-f590-46cb-8fd1-9a204f6a0b21.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 0x0de2f673532cedf88971e27b26f0a48b5221e0a58e8de7f246798b13051e9787. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:28:12Z), 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/QZHN92010203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f14f364176b5ab43c1c493c43917385c5c29fb67660cda6ed030b94018d407. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZK6H2082427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06c241b738942e51151d6c6d0df07fc29392289a3ac2137f73d6db5d4464a7e. 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/QZES72218082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8873e5f817f9c33d9a9c5c047a59728682df8d41cf37831f116ec612339cf9c9. 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/QZHN42212077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93be9f079c287047fac5e20417cca40bc07f9750297bde69bc6e13b7edde64f4. 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/QZHN42212079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed96b9638b2438f8ee3bd02d2bdd35aaaa039b2da0a669f92acc5c7300ea5427. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:11:01Z), 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/QZTAY2216185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4600a0fcf2366e7358a388c832a1cccb0d00f63694946541071549f74d5b0e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB52382148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb908ea1e8755ed4b4d2d9e5a6b0796c9cf57b6ccd844721ed29bce5cd64a19. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTBD2416575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fed77bce2fbeca491e2354f46e4ed91b9bde7665e3edbdb4c2e69a2a9f5da4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFJ2412783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe51424d6d4553334db918822bda2b30203044beee83b71dee939dd4342097c1. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZWFS2476599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4600a0fcf2366e7358a388c832a1cccb0d00f63694946541071549f74d5b0e. 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/QZTB52382148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804b1f5e9d26d8aa729c4716c972b062bd0fde284da6fc0ce51b0cf5aabff406. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ22524010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe51424d6d4553334db918822bda2b30203044beee83b71dee939dd4342097c1. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QZWFS2476599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fed77bce2fbeca491e2354f46e4ed91b9bde7665e3edbdb4c2e69a2a9f5da4. 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/QZWFJ2412783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5203fde745596d364c28850c91f47f7f2784c693b8316754968f10c8c8c46dda. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ7L2533381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d3e720fe77013cc44ddb89d17db207e351c327ad2eabe0b4f9955b77754efa. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:24Z), 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/QT3F42565881.