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 0x790ce73aebdc889aaea9ad4292a8296311731063cd17251a30157052f75dba15. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e71b328-e705-48da-af43-00639bd3c287.json and https://artists.proofprofile.net/proofs/artist/7e71b328-e705-48da-af43-00639bd3c287.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 0x5a91b89ab56dfc678d5c1863df7bfb06ca3245cdf9d73734ce5efc722caf1496. 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/DEZ651366122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b70abe5f03875c5e6b32ba4b181039608754e9fe19a4ee78f3b0f3e970d1a1c. 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/DEZ651366123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5162e610d8ecff3ac658e09d9b2387cbebce95be3dcaa319c3497c47b1f053. 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/DEZ651366124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19ac2be6f16bae00ae7bafa8d9e5b672f084f2ebf14650d1f751b1cff14f96c. 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/DEZ651366125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dfab1e283fd545c640747acea792ad6d6b0da528c09822257c873633106307. 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/DEZ651366126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dcb8c6152ecfc75fc1a724d10dd118397bab6d142b9d007ca7f72fb239c601. 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/DEZ651366127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb587ab643b41ac91aca840e87b6a558013ef567e7a26784e0cb7656fe577b16f. 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/DEZ651366128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a624c0238292c35a64fc25478b2a1b799cc7e2af9c54218fa12e4e4ebd00e0d. 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/DEZ651366129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2442f88790d0eb363f0d2c3078d0da60a2ef8d12b3eb6bbf25a2626d85ce8f2. 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/DEZ651302649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb336b589c33be1ca195b6763b7879e878225482e04baf8ff2ad276b6d5878dc2. 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/DEZ651302650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201446e96943b42099b66d1e990308223366a660b9ead9d445ab4f497669f16f. 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/DEZ651302651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27309e41776af874e03635b28b3f14d794833ceeb1ad450aa5a66c8bce37c9fa. 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/DEZ651302652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2306a7eaa7dc0a7bcdfe87f788b513b71d1b19fa656c20704c0ff8dbcbc6485. 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/DEZ651302653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f8b95249f8ed2b86d69bf74c7a7d455d1ed7e14be6dfdc09d0485bc046659d. 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/DEZ651302655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdc173ec33ada25388f6e2ed700923d019b69de1809519bcdda02ee7f1a192a. 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/DEZ651302656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6c6d3312b23e37ec4a29e5dfccadb8b86f712ca82a88ce735d08625117b5c0. 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/FR2X42082993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e207792bc58cb3a58139e7c0ce0f178d5142feb6d666583a9c51177917a02c. 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/FR2X42082996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361bfd27a8ada904dd9107a131aefef52466b4e7b7f363dde6ff53263a8a23cc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR2X42082994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6c6d3312b23e37ec4a29e5dfccadb8b86f712ca82a88ce735d08625117b5c0. 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/FR2X42082993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884e44502247669b99f2859a4a7fda25cd7bc2b22e189e4528d7db00e6f89438. 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/FRX202167253.