Gregorian may refer to: The thought or ideology of Pope Gregory I or Pope Gregory VII (also called Gregorianism) Things named for Pope Gregory I: Gregorian chant, the central tradition of Western pla
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1301b69448daf0f7e0d06f7898edf65e8812ee9e385da12042fe5bae8ffdc3fc. 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/9dfb7235-267c-458e-b521-0a1d99599ad9.json and https://artists.proofprofile.net/proofs/artist/9dfb7235-267c-458e-b521-0a1d99599ad9.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a39f1de88901878818ba3be7335bc6a39c2dce496b784dcf16275395804c43. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH842100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dc40f83efa005adff76112bcaf3d0aece0a949f0713f725c73f4d9ab769a51. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEH842100390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a70f5fe6650dc32e66bd91f646d58e972912d3cfb2019caa131d482190db32. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEH842100391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168650b3024abc18b393821e009067de824ca0a8cc1377830015c47c3cf5287d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEH842100392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf22cbf5af4dbe0e7258c14455e81a2c38d9f085d10c98574aae99576dc8c83c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEH842100393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8454716779063a7988288bb1b2eb03d41397032290fe68f068b12aba497a4221. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEH842100394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36900bd0c05e4ff55ba8b0ddb674d6347e28d4e5f6c7500d3a79d17037899cf3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH842100395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c73d36bda0f5366aa223270e4089d2b2954a4dd063074f80461290e44da4185. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH842100396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac91495f53d03a45379408e953bb2e5f4876eaab9339316ff4bb73855e93ce3f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH842100397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce7858f2673052efee7751ccf2fe9d16e500c08e3f808b678cd933b28631a10. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEH842100398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7b9f98bd1bfe3e41acaddbfd3399b6c8fa7d904d04006b53c11964a837bd55. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEH842100399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2ee17726233149bf9d317de275b1985be71d8c9c2412bf89da32d712bf3eb7. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEH842100400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff63123ac323957e9535ad5bd31b38f70c516609fe0a9695160c184f85aa4d72. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH842100401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bd5723ed48740e0c26330f430a07e6947cdc23f3584294123285c85b619ba7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEH842100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27592bbfc67a73bb764dfabee792472efa930ae59c8e3f8ea8c8e1bfd4fc836f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEH842100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a39f1de88901878818ba3be7335bc6a39c2dce496b784dcf16275395804c43. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEH842100404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109369e149a8574bf6c3d49565f63798d862df9bfe09acac18e4d2d1c048b0b4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEH842100405.