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 0x54b89a676e17e6c218a220f7bbbb080cf5b842a1f8fba3493dbf86d7c873f0b7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdd99ad1-dfaf-431c-b644-039dc98eab3e.json and https://artists.proofprofile.net/proofs/artist/cdd99ad1-dfaf-431c-b644-039dc98eab3e.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 0xda0d17f7650daf95946213093f9d87ed2a3c8f4cb383dc2174bc9d957bcb603b. 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/QZHN52255598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898e6d0e35877e9e834d6a5f907c88ff12e615aabd8137df53ba702a50cc0386. 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/QZHN52255599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52927d0b128d7cd0c4b3c2aef4808af783d7a289e8e24671bee3075e6b14daf0. 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/QZHN52255600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7480df0042b138bd15b3b7b70eed142db8575fb6615a8b0291f39b5674c21669. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN52255605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21084a70ad54c388caf3cd4f25c7053ec32c480aeecdb75fcccac8e7c3f4ce3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN52255597.
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 0xd1b25d3b27868e78289d1047cc310df0ec142fd7196879f95ad7bc25544e5912. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZHN52255601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269e38bc05b62f81657e687b3ba2b45985aa4ecb0a2e0627fd597a45b203ac32. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZHN52255603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315e1e7c6d99a2ee0ef581e4d6337f42a5e7ae947de477285a8d38d77fc86b9f. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZHN52255604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c84b2afe389924ab5abec1557c763c07ad60f4c45465c9145328eb0935ff11. 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/QZWFE2447343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464634db5ffc07cf424a45070f3c18644e6c750684518debc521872df105a067. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN52489202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6ce0bf8e66c8260ea0a7d41765ad1c2ab24f3e6b33735dd45165f0c5ee41ed. 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/QZES92406547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51e5a3cd3b3150cca438e5b02728e74d1f2ba29e725aca7cb3e99200da657fb. 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/QZK6M2384488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a65a7096faedd8ba9488413e5784dd286939dd0cbb80a0af8e94911a6a7f10. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GX3Q92356402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b9321c78b3d5f41280cebce1f489acde3b50a71fd7624bff0ae6365689393d. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZNWR2223900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3052d73fb6f049ec7565b4be3fc28d318f113897dcd895fbb78b79b6df473e. 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/QZK6K2263736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefb3b6f41a3806a079418f6aea0b168761bbaa0491901e82373653fa9cc6404. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZK6Q2200733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5286f09dafef0a85a65b81702b5baf8b57f3c59f81148e31191d56296c0aed7b. 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/QZHN42288028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15ed3a58798a6c27221e61323fab75cf4142b59de287f8f0a4a73691ed76125. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN72267460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bade9dc88d548c6671b661e42c70ec6fa2a5d906462eb1c65cf7bb6f6549233. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZZ7X2513861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec92eeb14ab1ab028138eb15bdab42c63194582ab6dca8f96c025568c3f71de9. 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/QZPLR2531087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe849ffab7ca96518d4ac19e2e00575ae5fc551fdd6ac1e50db6d0e09cb33682a. 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/QZMER2505271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed88664314e4af8cf4e03495eb9e0c11478e98c9a2db8ea18cc9099e9a4e145. 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/QT3EY2456662.