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 0x16a29114dfc3cf06ac78135143bde113743ba3e4b129e3b894cde1670ee3307c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f5908eb-2631-4273-8507-e5388dc95dd3.json and https://artists.proofprofile.net/proofs/artist/4f5908eb-2631-4273-8507-e5388dc95dd3.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 0x850b674a1b8a21eee0ba9db5a8d27e866f6bf90c161e5f445c9eb16e7330569a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBAFQ9400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181b8aadd5d1e68c1757534ec7dbbe44986d9f599125ae5e2bb0749fa5b99d09. 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/GBAFQ9400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2598fd319bc38e96ffe5521d1cc47d9ec91750300b3029270bb559a66e1cb77a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAFQ9400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49167e7cb431308ba92b256f4ac865d75fa04439a79441acb04096e0cb5cdccb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAFQ9400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b47da47652ac9e3c3026980a0803a26893d2997dccdce0b29dd717acb7f1d64. 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/GBAFQ9400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf81944ac07fc6c07d6b56d6792d702cc9cfa03078591f6e09fd31b05bcff21e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAFQ9400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ac2d4d6d94508f4f08aaebf68f98846ace9ad149a5e269ee2e11fa1c423209. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBAFQ9400062.
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 0x4d43bbc8010fd42732abea5c1c6b3e540ddb5d43b971bc1dab41739283547a09. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBAFQ9400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091f75e80c59b445c6de77911bcf022a051fbb3a40b66ad11174fe7bbc62e19a. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/GBAFQ9400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ef18283b7e10e5f34f4cb842c064d31c1ae190232aee7c0528adb1effb0ae6. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBAFQ9400056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6703f6c39929c3f5be0a789231470e409513140d8329edf44d7137d95c5cca8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBAFQ9400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e3754dc5a7afbffad42ed04f8a71b4ad9c36627e14a525a02f4231e9e59239. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBAFQ9400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf822f68536d8b6be58eeb0b0868f3fd2e5c1864fead359f4caf539bbc5a1e3b. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBAFQ9400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8d41692594bf9095a2c3abba76126501789558d56a64cb79d21e19043f9de5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBAFQ9400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57005d6f1687d71611efae399bcc810de1de4d40f62f1cc1daf03610ec578a0a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBAFQ9400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d77df2c7c309484fbafffc0ccb6ea11d8684a09d95e8f086600fe6f3d9c9d08. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBAFQ9400041.