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 0x3c309794297948fac1effb3a7330e607e093937f44b8abf732543710888edeab. 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/61f67931-f7d9-4561-bc8b-1afbcd016888.json and https://artists.proofprofile.net/proofs/artist/61f67931-f7d9-4561-bc8b-1afbcd016888.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 0xb4461ccd00a0f6c70bfa2f73aefbfc92d9c0041695fd55aef72a23940ab0b16b. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IDA601900905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf897f098dcec1b93ace5cc3af4d0a1c08deae17da4e96aa96fe0cf60aaa8d7. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/IDA601900906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866e99e1112a81b6c9be42c851a6828842abf789b8703ba5e6a5df50a45924b1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDA601900920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6dbad14a5a36c52537db85f11c84b616dfc4900a5ed215a7b98d997673e29e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IDA601900914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bf1d2d42594a45b3168ff93d905a0fb6a9c35f6dd1b8ed6547f782f53283e6. 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/IDA601900937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a18f5276fb6f64f2780c8abbb2e68de49931651b23b43894f7061f75d5f19a5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/IDA601901173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b487cb1a483635352657aa7a940d0ccdb12e7712ab76d3fd83a4b6e62e6c30. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/IDA601901181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c26bbb568dfe61f076b3d27cd3e77ee13d08f9b2c88564f25e5bed4062b3e29. 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/IDA601901441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253c743a4de612e967cbaee602814a072f8d87381896074f84704c439499ed99. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/IDA601901740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb736e206f28bdf1bd0226032b5487db8725788a64a18f2cf2030ea1a06c8d0. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/IDA601901766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3be67a87a234b5505af2af40fe9ebff7eb1dad5703c94da5adf762ee24a63f. 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/IDA601901786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5c63fed7227715ad14223bc4f1f607d3bcba265df8145f97de0098fe880578. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/IDA602300726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0516c1d28d84b861b20d978c7b6b3f88c2ab7cf89cdfb7cf6ce93315407801ac. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IDA602300759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573741371c716139e90a7eaee7b593b29d9aeddf3f405b7b05b52605e55aa84b. 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/IDA602500357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf812d8668c42dc97ea1adb170b2950b04e16118358c93cee904ffa917bdf025. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDA602500390.