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 0x31de8df42181d176424054482661dfc34ed342ef6a64fa00e0b229272526b2f7. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b661b7e1-164c-490e-a4f3-a90956a25a89.json and https://artists.proofprofile.net/proofs/artist/b661b7e1-164c-490e-a4f3-a90956a25a89.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 0xcf6c8f0efe00de42bc6c532a77b80b96e76ac388f4363df78248aa79e6ed5080. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZHN62279793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24aa737843dfae0f4fd8eb06dc9c1771e024af0cf84653b90150a284ee05cf3. 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/QZHN62279794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92750cd1f21875cc4b1a797370945435ac2a7f4b7ba66af2a515e02c723dc244. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN62279799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15b7bfe2a962749641907dda2e0804e9af0c693fa20c7a8bab1daedf48f51fc. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:05:10Z), 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/QZHN62231203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c24e0d7b238d766f1d312be163b390ab50f6fe8adcc29ca92c5875f8c48035d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN62231206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcedffbd57c9683a819eeaf1180e2d669f542d88e243a44b97798161fa391344. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN62231213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c509c7bc912f076479b66e4114bb2848b5bf1a3bd3a8beaa22d72ac5e393b1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHN62293930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d17a35e4f759c0f26b12768a255cf136b23c8a98dc772083e593d9b656b806. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN62293931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed33c80ed1e2a11b068bb84c4e2f934e57dceed05df158f135ee2d5281c7cc6. 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/QZHN62293932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2c661ef226d454382f6f6bf67a2ada1085343e538e5912bea0ea5b41d6f8da. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZHN62293933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5c19f1d79d4cf5e9710637fa98b9783fb70b6a131d73e57d7ddcabf661cb16. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN62293934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fdb3444e6880f3c0f25e3a188561c04dc6d0596206840f9361f92b68f60c81. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:28Z), 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/QZHN62293935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfb404d2b99caf55720d6444555b1ebc24b1a9c4d8f1cfc7ce9adfd626b7b02. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:11:04Z), 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/QZHN62293937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053f656478671583868a26dfec46812c39db51c094063f6ccd08a846f0df0a4b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN62270083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9f29e81870a0233dc2cb6396ece26a8aa7f41d96fd800f1afe33d92e08d8b8. 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/QZNWX2365795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5f24f86060908b54978984617fedadaf6653a2b6138472dd2095bee8bae002. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZK6L2441860.