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 0x1997941b7f9dc98dcb247fbfb242fb141234132f03f7de429b94a4585b3aec9e. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e21dcb69-8053-4635-9bbb-65f574949375.json and https://artists.proofprofile.net/proofs/artist/e21dcb69-8053-4635-9bbb-65f574949375.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 0x125bec236ed2f4bcd380a05d566a57d2610eb84c3bfff77991002ae564cf1e5d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:48Z), 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/QZHZ31980950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6039f382fc074475532b7ed2561f1b0f7ff5874bd009a86e148ae908fc54175. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/QZHZ31980957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360758f445a4f845e8bf686f0f2c57b6def9aad425640ff939200d0f2adc7568. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHZ31980959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd508c15048e7716d9d570b5ac5c1ea4f2887aa166405afd656f611cf381a2a25. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHZ31980961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dff9cbb285bfc1c053a7922ca182c41a9d7cf8b0ee4d03a9cce45213b0d057e. 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/QZHZ41963557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0337d1bb03e199c3795d733a2796f288906a3af171877015a6b3e32160c1a255. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:42:18Z), 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/QZHZ41963562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15176fa8b028f9984f93201153336205e823735fd22fabad4269fbd9db3a16cd. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHZ41963563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5982382c816ad4577942cd8e0b9e0a48a2ae11344efec166fe88701faeb71c3e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHZ41963564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5660475b6f529cc2fdeaed64db8adbf86ad8d4955bc2ceef8a8e8c3340fcc135. 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/QZHZ41963565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84fe8f49aac4e53af309ca8033197032d46637beb78e7fef7b397ef26ff225b. 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/QZHZ41963567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ee3d87421117236c5b0b2c8e1efb0b48ad979f5027baac94b0bad1ffbfce71. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:17:58Z), 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/QZHZ41963569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a4d2af4734b58936275bae29f7281b7901146f56a12864a2d37eca64ab3264. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZHZ41963570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d0cbc702cd539289ad012c4b83939f9ed0bcd54be8608f07632bd3b66afc42. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHZ41963574.