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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 0x9758e390f0323a0f930e0c53a3b5c8beb5aca96c937911b1e302a6191aba8879. 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/524dde0d-56b3-49d2-936e-4340377d802e.json and https://artists.proofprofile.net/proofs/artist/524dde0d-56b3-49d2-936e-4340377d802e.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 0xd72510a89786cdded9cd6f39fb1c0ef4b68f268726617427b74580a3f645d3ed. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCACQ1667912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7dd81304b45f202a8ee5fcb85f95e340fbf09b62253d9da5179f5b35df3e93. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/TCACQ1667915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ad3bbffc3471c4a06d22e66805dc2f79499510e136baaf890f45014ecbcd36. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCACQ1667921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e78cbc8cae348755e5ed6ffb174f57dd622c96eb7f6275ac3f95561252415f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCACQ1667922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb099f1bab942a799656a20c762adbc8dfe5fb4283bf82c09597c217885d98b00. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCACN1674392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb017d954e5fa4c9ee1512c4cd7ba987dfb1e75100ef03673b1709f68d5897737. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACN1674393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd3ae30115147e482fa416a75bb6c4dda40c48cb44660023dbd7af8b386a2ae. 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/TCACN1674395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd663e92f8c853d62fca97d7408040d515cc0fcf504b979c29bc396a1ae8783. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAEW2035241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6065019c263e186cce9e2b030764cb020838c0f702af475a35251211452543. 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/TCAEW2035261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f93ace4348ddbb94b6596d238beb2d92f1e1e79cfa04dcfec7bad3f852822c0. 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/TCAEW2035263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a64a473f8d2a96555296bb182fb0600622c79878af8b69b5715118a7fdb91e. 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/TCAEW2035266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf137c75fce51ccad3ce0e7592a789c23f4761b400a771684741afe750fb406. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCACN1661568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f453f1ae899bef0f8e72164f7c9a265e2c1dcd4a676724bc6d040d393e94e8. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/TCACN1661569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7b574db40ffebb81de0b443010584f807607176638a0c7a7de72ee68fb56c6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCACO1672306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b53d1eaa0ffc4a6d45be995eb801ca39ee1efa9196678e0f5e44db312d2943. 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/TCACN1661571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2f2221d63492fb7b199b4b8c56e0530fa779fe9a58bf9e3fa18d0e8878232f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCACO1622777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232db65eb3314af79eae865f76749ab96a3370c41a17c08f56bedffc33ff34cb. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/TCACN1661418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb138cad3300e64444ff6d2ac848a9e97e36f1b6cedbbbe3552664b0a5fac86. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCACN1661423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09350ceaf57eb348d2225e5f8233071281c0fa28ccd2a81459bcd8b04121ee90. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCACN1661424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1975d3b6130efc1c582357ab05195a1ca5edc9d9fde6b9cb523b035ec68f49a3. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/TCACO1625442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e9d8f06f3d85f4b41b00ce6959cc1a3de79368145de6c1c110ec12a1a6137c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCACO1625443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276a0ee42b194e34c7623b8ed4b6d1bca656135518b94907a4cfd3b462c4ef81. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TCACO1625462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423291272c22018aa8db74d5695c1a0a7b7e2a3c70600a1b70a24e9f613565eb. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCACO1625464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d660d6f68fe13eca8e50a25aad5da28f3761ef4fa6a8c9980684abb5226e2fe. 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/TCACO1625465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3faa926f466c021fefceb154ad562253664573519d118b6a725d453cf23f304. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCACO1625466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab49ecda21a9dde7e6bc2cfc242fe0014dfc8b87bbe58d1af71e1c0bfd55657d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAEA1980451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3d8a9b20d6e9a7b8bbc49dea3fbfa6094add6a1c148cf7049b82eab7a2a150. 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/RUACR2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51567637365fe5a8273a7e469cf53414cdca95fec3e1149a80d93b89aacd2ee7. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZK6L2551994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f033e97e2e46a6cd5ac37a1eef67c94aa130785c4917bb08d0884803d6fb771. 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/US6QR2300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9024fc1705923be5577132e0b87b6aac885add25bd1d56fb01b41316ba08c834. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US6QR2300100.