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 0x6c47f3439dd5d69d760ff04f7605dbccb37cb1aff0fe4d4fa7ea9a5d2bcb26ac. 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/14b06319-a2d5-4b54-95f6-320bc262f79d.json and https://artists.proofprofile.net/proofs/artist/14b06319-a2d5-4b54-95f6-320bc262f79d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zontani Ihografisi/ Pontiako xefantoma, Vol. 2
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 0xccc98ee32242b8f9cb7cec76638d738cd9303274328de07e079470f11f81d184. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA561316302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd66f61bea830835f66e1c49339aee1aca8823ee09cf3caba6900ffd5e1b5dc9. 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/USA561265290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c94a2ae313cd622c0253d127b7c4b72ec9d6907a405d2238e9cf9cbaaa56b98. 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/USA561265297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce81a018736ad7881cd3f13b8d3cf8789101cc72756cf4077ec0debe958b1dc9. 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/USCHR1379604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5e1cce74af77ff433fc800dff9b06304449431a006f9e61fb119a704ed1646. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USCHR1379609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fe13ef5ba5f1498825b2619ca384f0cdf923ca6deb525d57d9177f2e1fc5b7. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/USCHR1379614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985cb2fa513f7d3337b7d1928783e4469707fafeb65dddcf57f747da372949ef. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCHR1379617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa729d472fcee1556f3883d9aa65a930a0b7f56480f514393927046dff1fb4a29. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USV291381485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf5dc093fa5a49522b858513c9027f1ef8b5df3bb9ddd25ba309af97f05184b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USV291381486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1b5b11f907124121e22694012d32e847e303ac958fe1a6ebc296801be05486. 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/USV291381487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbaa52cd279dcea66fe8b222ed26a44e0fe1fdfe2d17ab12746321f6b854d80. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/USV291381488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fde605b5ab348ff193ab15f03883502ccf28a596328acefc96a37b9528aaa4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USV291381490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763e2985566d3d754c0ca8d15e64cc100e466aec48f1e9c7da63379b80850304. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZHNB2358356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b8e05e353b4a3b5c0556f76c509717b4c4759833aab47b43b91b44f1d95826. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/DGA0M2398475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194ae4bc38105141e25ad224af18f64f9c1d30277391bc83c4a4d028502414c4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TR0331911699.