thumb|Confession of Love by Jean-Honoré Fragonard depicts a subject confessing feelings that had been concealed up to that point. A confession is a statement – made by a person or by a group of peopl
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 0x5f3c297286f42fe2e4985216b6b2d60f30e4e4a773b7d28f5d7c044d58f6bc2b. 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/c49504b7-412e-442a-abcc-ef4088966c4e.json and https://artists.proofprofile.net/proofs/artist/c49504b7-412e-442a-abcc-ef4088966c4e.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 0xd47f0e835db61080ffd89c3e4c05e4a3190afc38f2d95a2cc120ff8b6222f988. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/AUUF10900526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506962410568fabd3af7935b14b9cf907690b249f794de4014161093728329ae. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:25:52Z), 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/AUUF10900528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970da05378fd0ed13929bad9317b8936c10eb3ca9311a1ecef867d97f82a0cef. 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/AUUF10900530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acd446bb3b95fdc3c4e1e48634b655a7291a53bc13318b3ddc91ab5f2f5ba77. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/AUUF10900531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb7e90fbf498789d12cbe25307295ab8f7e15d8982d995a9b769129cc3e5e6b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USFK91100323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41068cfc5fe22f0cb2a53e80a43adb4e2792a1201e832e2a89da7473302be629. 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/USFK91100324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959f3e06fa5d9267a977253e6f8c6815810349e2c386f3fcd55bf5b5a65dd500. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USFK91100325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc42f2c6b775884c284fc1617a56ffd2a5058e71045c528157bf5444fd8c11e9. 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/USFK91100326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95494ec377e5106d6adc4e88aa103d05ff4d86b25d47a53b92fbc0efb23c0e3. 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/USFK91100328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e66af6e8a4b8c0ffb830edc0f29a99efd582e89104c168315b14cc85bfa0ed. 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/USFK91100329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa284bb276942db7872d8199a97b84df7b4c202a27049012386a8419408e4ecb6. 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/USFK91100331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102e37ea6112be66a6bf70789c1f5e14ba45e6f96e61ef36ef2bd33d75621610. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:22:01Z), 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/USFK91400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ac67821018be70a5ecba851606893b4788c8d1ef79f4baaf03b971d4ffcd8b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USFK91400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefad46140006fd5ca051ac86ceaabb0b3782969e155cf8a56c5add3bd7dd293. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USFK91400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ba771d3daf0ba0980d9697905d94d83f16a3049d525dcd5c744989aafea626. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZMEP2004874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f5bab3766af6a73ddc8c875816e4044d40d3a88bdd8f4b0a2c33b7237a3508. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZWFH2432794.