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 0x83399accf030c6ada8a9ba310eb5dcf65f889253cf006f1114bcfdb2a315fb52. 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/72aa1fd6-51b3-456d-a695-9bf5c05c2266.json and https://artists.proofprofile.net/proofs/artist/72aa1fd6-51b3-456d-a695-9bf5c05c2266.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 0x1e86c14b4418d7fec7711922317b9d82eb21d45e4af14d44f051b707c9dd195e. 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/US6R21365772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ece8725b44a44750cf9ad837c7f12824a53a40a32dea1869a55b43f13ef1d87. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USME31202923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e08f2d8305ca72bc48f3d54b612b8e15fdaaaf9a13c9989006113d7f46b5295. 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/USME21202763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404f7cdde35057c4c096a64dd39528082b1d7a5c203235aa32b02540ec4d575a. 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/USME21202766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404f7cdde35057c4c096a64dd39528082b1d7a5c203235aa32b02540ec4d575a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USME21202766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9a79487e46dda4af1ae38beca2aaf011b1662a406a506c7a22c29a87910a26. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USCGJ1527183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2564e3a88295b47ee7b315405c45b9975e923bc1fb1cb55f47de40cb823f8562. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM4TW1528493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31fe3ae910252ea4deecd43287558069b57748d6ed1b960354b4983b9f6d842. 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/QZ7PW1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dec8860c99da6fd005a729d73e30100e821ecb83c443ddd113fe8920da1927. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:06:40Z), 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/USDY41965005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268ccc0254549a8637b9fc69bfeaea3b122c9177f7636f7f8fd080c0aa038a3e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USDY41965013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c094a2234dc48e70897c290d628bf759dda42ecad07a64370e08f37109972c9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZ7PW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a852d4fa36fe2756acad3331ce05ee98fb009ff19d0c407f6ccc79f2554ed64. 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/US6R21448795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27bebf158837cf3d5802347e549702da68903f8b99818be4a88976179468dae. 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/UK6BP2200414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec1d2ee020bbf9d5fd648bb2886bac760eae6b1fd464920ce1d19c3856848db. 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/US7SF1455636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cdae9909e6921e0cfca7977040389022904d3bd686e481dc4b698b6289c8b9. 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/QMEU32203672.