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 0x30aa999d7074a7e30bddca4ed84ed4f1a102376bc501bcf81000d309c1b8e4a6. 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/49487764-5180-4d65-b6f5-47fae7ba33a3.json and https://artists.proofprofile.net/proofs/artist/49487764-5180-4d65-b6f5-47fae7ba33a3.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 0xc8a2d7b2f4fbf20fa5d925f6fc76aed7c40ee614f0039daf94c36ad79198e842. 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/NL7EN2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ca10ace5e5fb4ba689c76a76d350efd9f155546ac6a1a36ca2a0fcb141a476. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLH2L2300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329033543f412f221c17fec93de6f285a7bfcb6204ebec101c3e8018b2b1b72d. 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/NLH2L2300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddd81607671ea446165286418a7a66c0e4e88aca3418e7e9d1ff195fd80b778. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2448532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0731e8402904f28ee82fedbd5c60cd64d12497db95e7c092a518e67e15e078b. 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/NLFL72200425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7259689123d35c98a1fe54bb473864d0782a1be0997cb23117b60e8201093f4. 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/NL7EN2200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7259689123d35c98a1fe54bb473864d0782a1be0997cb23117b60e8201093f4. 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/NL7EN2200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f54864fc677b511e7095ea155bb6ae868895b79fd835227032e446ffe024a2. 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/GBKQU2415567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d113da230b8af1425b37e8866224850ceb1ac412b4c70a7ffa28c37a39786b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL9CE2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25433221b3c5c824492d73582c6d03049d765b0aff66c58dbf8ccbd82cc2d66. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL9CE2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffcdc7cd2edf38896c3c3785cb8d1b8a9c60ecab7458a47cb55ae6269a3d599. 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/QZTBA2376307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffcdc7cd2edf38896c3c3785cb8d1b8a9c60ecab7458a47cb55ae6269a3d599. 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/QZTBA2376307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4965d2e495dc1c76655b6976f27b8c48125a29542c7cb48a296e1ccf3fb7c38c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BEB682300644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d113da230b8af1425b37e8866224850ceb1ac412b4c70a7ffa28c37a39786b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL9CE2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad78562602cf19b08df3aa5709033bb37e515c1287f18f22e8b0c5338327b8d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLH2L2400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afcc0c96e494730d560e0c79cc3e7a9f6f061bb39d7625b0e716bbd71a3b426. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NL7EN2200068.
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 0x0ef05665ce3c088b0465ccacf1fd10cad1002ca478e2522ed9427cc0cc52c56e. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BEB682400235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50487b701975b6d936b6138f3fa5908873f83aeaeab607aeee234e0817a956c8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NL7EN2400002.