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 0xb3c37bd4d9b6346b4730c1f2454b057b9dd1df9823a80efda1addb1042092b12. 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/fe35ac5a-ae0f-421f-a592-6dda2f69e2a6.json and https://artists.proofprofile.net/proofs/artist/fe35ac5a-ae0f-421f-a592-6dda2f69e2a6.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 0x86348940a41720f418c053cb35278e352ea3870402191d5704d56832d7804eaf. 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/QM6N22289190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86348940a41720f418c053cb35278e352ea3870402191d5704d56832d7804eaf. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM6N22289190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b2eb9c4a78083cb2a10e8ed6e8f6d1767c1e40e97259b169c81396f4343dc1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMBZ92254352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b2eb9c4a78083cb2a10e8ed6e8f6d1767c1e40e97259b169c81396f4343dc1. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QMBZ92254352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d90d86f8685153b1ed35c7adc313e3332ba217edc26b3092d0d62117fbb2f06. 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/QMDA62242425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d142f070af7c37c1750f32c12df73b96f2a9e5fade93850c299a3c9ac90802f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM6N22300973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d142f070af7c37c1750f32c12df73b96f2a9e5fade93850c299a3c9ac90802f. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QM6N22300973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de27c89ed7e6d9d5316256740edb52f4fbee64a08591577c1f6f8300a58a8a5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMBZ92326567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de27c89ed7e6d9d5316256740edb52f4fbee64a08591577c1f6f8300a58a8a5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QMBZ92326567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df001ff052d634a2a327aa37075ddff32a32049d9a1f7b94ad1ea397e19ae5e. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QM4TW2445303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df001ff052d634a2a327aa37075ddff32a32049d9a1f7b94ad1ea397e19ae5e. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QM4TW2445303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03dce77eb7321335f451eb556da83baa81371d4ef81174c07385c169d81a52d7. 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/QM4TW2484086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e1b639d6ea03a042b2d7264d780411d9380617de58f33222e6d38811d3cdca. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QMFME2476258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e1b639d6ea03a042b2d7264d780411d9380617de58f33222e6d38811d3cdca. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:29:25Z), 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/QMFME2476258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb493e29ca7bc90ae0fe4dbedf4a32f08046ed3580792c264ca86c996befc3d34. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:09Z), 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/QM6MZ2548132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f610600dc83f5f643c076396f1c63e339a62a9cff4bcebd4b39f027b27b129. 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/BK4DA2527334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccc2fc2e6a242d01ea0669f13787671903a453a4e11f328b415762593571f73. 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/QM4TX2439979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f193b6ecd312477a1691abd31153f2c7447c049553b94f92a678c01759debfd. 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/QZ7R42455504.
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