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 0x0a5b5af65dd71fc41634893a41479aca18f24d80a559d1475b6e65825ae40c47. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7da27f49-c07f-4f3e-858a-5efe82f4fde0.json and https://artists.proofprofile.net/proofs/artist/7da27f49-c07f-4f3e-858a-5efe82f4fde0.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 0xe53d0c3f26a4de3a26ee6304ad6dd69e0a237b76c9c65b55974953953b06c3a6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SEYOK2315261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6c83c12676ac27c3070288d3f7bbd84b0d39f9448556a9d50672349a180d53. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SEYOK2418852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99d201535b7af39acb255b9e5c2783b0f16a406422dd9cf1e1a4df7f553a80d. 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/SEYOK2418854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae530a28df970ca4a3b7b2cc0768a7d004704263c35b2145b31f9a5934e644f. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/SEYOK2418856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ace20b31afa9c704973f5ebb83f0b4a507d523e56653ddfd1489e881586a32a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEYOK2418855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7ec3ee12d427915535a52fe3eac9df6f2182665aa1579365682fe759fc4d88. 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/SEYOK2418857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c420f6af8d27890fa035d2ee27fcbd1cdf59c2ac94313075a05795b3e85efd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEYOK2418858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e556a0a0190f02145f7ed6b4277e0866d32bdd8c9993d3ccf5e9fb912b0ebf. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/SEYOK2418860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a29b95648208f86817796e71f46c994a4ec906f6d1a4bb0427ac844041c521. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEYOK2418861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb39497de8250b41135c65001f0baa8a4227c07a5da6386277229a53b6f8ac40. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SEYOK2418862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a611bed905e66bdc52d86e667039ce643d19d545e0c70c1f9f3bd5e1e73bde3. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SEYOK2418863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8380da046de1dff82470cc173ac8c7de3996bd4526430b8aac502611b5c36cd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEYOK2418864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f44000d58b58d4579c361c7fd0ef213a0ad4e71cd3627a1a78700dcf74b7beb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SEYOK2418866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07950e3211862e66558da583df1a56ce313cd2af21add3c025f7cafd2e2e07f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEYOK2418869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399e4556acc2eb2e70dc0591a20d1b8e2755cb64abea2ae34b80feee26a7331c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SEYOK2418872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6ffc511e4aa304504ab1911dd2daa675cb014a7ac89b8af9927531e7f7ef84. 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/SEYOK2418877.