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 0x54671729555b6b475106177f507fedbe3050ac4df6fec761af01ddbc74b9195e. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/242849e2-d650-494e-8c8b-bff44e0aa69b.json and https://artists.proofprofile.net/proofs/artist/242849e2-d650-494e-8c8b-bff44e0aa69b.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 0x42c4f3100145d9ff0bb5e129dad186df108baa05f982645c960e09c3bee1a511. 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/QZZ7Q2563849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb00783b2b94e2c7df8f3ae2ebfb065867066637b86a3e9465f89bd4e4570a6e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:44Z), 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/QZZ7Q2563851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e4da230c8b5ba4b6e2d171092cf3bf404d02dbdaea717f4b6baed1be0c6ddf. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZZ7Q2563852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbddba71ccb3a20b4840ce1db1e3030c547dc031a2dfc1c4f45efe08b540bcc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7Q2563853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef033e134ee589a0d5670d63d8124db2ef21538d00a29da8709f001c305a1de. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZZ7Q2563854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47f5529d5987935e92ed8099e51bd7868e2f976793bc0b233da982037dd8778. 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/QZZ7Q2563855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43364268c14e4b1d17e07575dffa69297a55577b7e0748e3bc59c3e8186df8aa. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:26Z), 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/QZZ7Q2563856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5307c901b4620c2766021b3e26d2d45fe78267f49d4a70c1f6682f50d56927ce. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:03:29Z), 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/QZZ7Q2563857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e2f3ad3ab952032172926f222ab174857795fcc0d31174340fe15b95ae3814. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZZ7Q2563858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe175bd88efd1c56c5aba96c7b6a6df866ef095f52b357931ad6eaddd9964e66b. 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/QZZ7Q2563859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4088a9f4ef43b9a6a7013a8bd95da574bff1eb2d4f24f2621038a2917b92bf81. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7Q2563860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01072c39d4e1a77e560bf32ecc87e439e17fb140c81c7fb8b2c9f84b704ef73f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:06:34Z), 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/QZZ7Q2563861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf62f730e4c8947dfe7a77780efb5932de7f12898953565f5813abf59312b5d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:11:15Z), 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/QZZ7Q2563862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd4f98e824c17805f89579f3fcdcabe562db8cb297da4520b2d2f0be188932d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ7Q2563863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b358c732d174b558d5159d56b9d5a0f52285f6a16107b299b9c0f1a9459d360. 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/QZZ7S2507967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86f7750118ff58521e2f31528bccbd54720a1e923d15bb345ed8ae65190be4c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7S2507978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda110714ebb0cf97539303e41a096897db55957b596ed8aaca5e6ac8d6cd92e. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:51:58Z), 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/QT6EC2532533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a519c82897ead86cbbdcd451fa5ee62ff535057ead0c4222787879338d14c1b. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:10:01Z), 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/QT6EC2532583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4193fc08425ece434e70fb59f1ace8a0a1ff55c3253a632c046e9ef729932b2c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT6EC2532948.