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 0x305f800322ca96a03f778903adc40b98d944bd74f95ff5a4663539d30cce1ca9. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83692e91-d5e9-4c05-b900-999e9a1a5aec.json and https://artists.proofprofile.net/proofs/artist/83692e91-d5e9-4c05-b900-999e9a1a5aec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cantos Gregorianos en Español: Cantemos la Salvación
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 0xdb42a53203012f5f4e00225d711c1c1123e2b02cc735f09da7ba3e517bf375a7. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZHZ41992786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb6ce48ad9ca8d3537f5e189c2d8b89d61faa0a202d43500754781f73773dac. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZHZ41992787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb645c4add6fda9fd0ab6f71a6ca926f6593db4b0cb3927b99098d94b46aff5e8. 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/QZHZ41992788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a35fe4d184e4a2ab4751e822954af63a4733b5b7c3e59561bee467af03f7a5f. 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/QZHZ41992789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3d087e831e98396d273d90c00b6e06232c458f77ccb843d52a448896e691db. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZHZ41992790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47a265ed7368c5f13d96d3da34ea7badc4d30b814d3b3ba652dc6dd01a4e06b. 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/QZHZ41992791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a842e20ff15ebb0d8fa56e99ce2b528098f8eac2bfb12a8f9ef73a80861c41. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:22Z), 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/QZHZ41992792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995ba13383b8f64fce16e92d8f07b04324ba0cb5f01b5e00b485ef20d45d61de. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:17Z), 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/QZHZ41992793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e357a6fe755f51fd9db616dba9863e7c24d8dbbfd58269090fcb21b4796d78. 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/QZHZ41992794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd594744db4e9fb24d0c07bed122d311aa9f57e47031490090e06c68a132b967. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:21Z), 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/QZHZ41992795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c957ffde054e2c7d12a8c776278c42cc951becfa0f2c04acd0cc342a49ca4c9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:26:57Z), 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/QZHZ41992797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6735886491cf6ae4bf91d4653ac131ffc9300d88ee500998f545f671c0baa5ad. 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/QZHZ41992798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05cf71673d626e1f16419413cee65bd067eee507af0fd4ac7404ca818ff418f. 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/QZHZ41992799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd030e473835fcc23cd9161b75b98bb638c17fbea7b3397a42f305316a24e9f. 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/QZHZ41992801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd188b2fb1008bf2954f350c586218f04e178cf04ed0d34a5e062f06e131bc673. 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/QZHZ41992802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d451e5e8ae1c28457255b80698d50ecebe25b0d1db91304f90223613d18d809. 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/QZHZ41992803.