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 0xa19f7e366aecab6bdc8b21911359d41c86650eb5df12a61e41fa6dcb9b02b455. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4459e557-52e9-448c-8153-69957ec762cf.json and https://artists.proofprofile.net/proofs/artist/4459e557-52e9-448c-8153-69957ec762cf.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 0xbe5e3b514d3a76d670b2906f3915a8c3d2a25cae58a12c218c534d785371345f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/INL161130735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179b63d0726eae198843a8814b19507296f54d34c294d94a84992dbddd27b0bd. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/INL161130736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3dc2371d06821b1afa835df64bdded2dbea7dcb5f488bdcf6bca01f1f97576. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/INL161130737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f089adcf1680474d160b251e5e82cab5d4b9e7473854d803ddcab9638a215a6. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/INL161130740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9c39fddb0b7d752fd1cd3b78e2fe03f3c38ca97268e5b2ab46076c30846cb7. 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/INL161130741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2541bbdebc248af2c2912c5dfabc3c3383cb58c1734886ebb7194c79486b274b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/INL161130742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbabfcd442fdc0fce3445df1eac979aa456a388afdb05badea6a9bdbb1a34f2. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/INS181419338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1a8b85ed8b977d9940136dba5b14e493a1a4b85f1530e7020b6d818a089f86. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/INS181408977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02632058eee9a042f3c44f05b10ac77c139ea1d57adeabb5f6c3a7993f87ace. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/INS181408978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48003581443e03cd8de9bd7f19fa0ba1ec1f08f2c6c3ed1edd8ad548175155d2. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/INS181408979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64108c0a4b0db582e24bc7115a009e60496fd5474a6457c6677de111e4794f14. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/INS181408982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700baeeff1d4c6dbb8a4c06aa9afa42884d83b45fa0eb46ef904c97261bbf086. 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/INS181408983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1794a9d22a37a3f52c08feff3c11d694fea5da823f042f2bbc69963bd4b4912. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/INS181408984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdede51413453459488820baeb634722e89cc2c4fb9d4ca68d543d6872c789e01. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/INL161130728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e337d38851da4d37bd4331a98d08cebd8e48387e2941b7d53579150e770cc4. 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/INL161130729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52efed62a898cf1dedfe1d0a693411582faadb3b4aae9ebbb985258604c431bf. 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/INL161130731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe741621f6b74cf1bada37c9c112b905979bf5ef746d44699a678448e0789aa82. 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/INL161130734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa9162b30a2fdcd1a266e02a308292207517c373157bd162b5942d6bcc01da9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/INS181408994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6198b61acb0109d554d4d98e955d07f7c35e3016817b630ed968d85f7182c57. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/INS181408995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f372484c51df7523a1e29848e29e8870cdd5623b9eeb23738fa3e2e22d893b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/INS181408997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778868ac0b67a19e215925329e23c43900aa3075cfb0bfd466a2dc853273ecfe. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/INS181409000.
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