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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079943adc93406ab9d3d0a2dda937119a460a1446fc4ce0befbf6675043f8b47. 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/a1afa16a-60a9-4e69-97e5-10e06bb550ea.json and https://artists.proofprofile.net/proofs/artist/a1afa16a-60a9-4e69-97e5-10e06bb550ea.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddeadce76ea04927d96579c189ce29e1fc4e3da0078aefad751982aec85cf18c. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/SEYOK1755824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4358bd0955c68fbddf1a205994ac69b805a20f2e7244c4ece7f5cee053ad9a. 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/SEYOK1755825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300258c214227ecb581a29dccbe8eda361a85c276a4afd38454e04af70dfa360. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEYOK1755826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81c3243e09eb7e142f92cb23094b3fb9efc769cee5315663dd7631db2624ef2. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/SEYOK1755827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933ef8d3271d4d74fcf57c1bc637e275c906504c127f059162e5b2aac3b8e0ee. 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/SEYOK1755828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29a98126725594834d665b65af50a50a27d58c61e7aa28d4fba47ca3b758afb. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SEYOK1755829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d8d1c63774bc3f666194641695d24709faf0b3a67012809dfcf158f43b7c83. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/SEYOK1755830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a4ac4421f66950fa82e30b517c4265b42164728e1f74ac76928371208a55b8. 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/SEYOK1755831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fea71c6d722846c30701eb85d7f123abeeaf53c967fe75b573caf36471bc55b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SEYOK1755832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4ecc96d4edd5412c37131e012118dabbf9391f553ec857e1d39b1935877c38. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEYOK1860898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d855bca7f062b5cf404a5be02b6f10ff9b77a0c492cc456bf4df26b59bb7254. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEYOK1860901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8075b3b57b14205e2e96c1a493116cab92ba39f2a29a519ff262f959a5ce32da. 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/SEYOK1860903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde14c0829fa24ed3ceea6a61f6741ff6cfc08a41b6e3924a0765c6316c939d1f. 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/SEYOK1860908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408c004924741675676c40ec6de409ac6cda24524621e1bfbaa45bc8d0396b71. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SEYOK2031042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339dcc5bd9b6edf8c8144deb7d49c70c31329954c80d710fbd6272458f72b7ad. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/SEYOK2031045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c4f4ea5c9fabac90b4d1f7558c87ea66cc008f8ce5c30e79bcdc93ae9c7697. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEYOK2031046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbf5317b11268c0f0f6b30db8069edfb759168d52ba78f1a20d9119137d0595. 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/SEYOK2031048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232dd9a0b94830970309573677b187f118d47c6cd35cb293c469d7ff3b76b5cb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEYOK2031050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8eac30752fac139f6c7530e00edc30455bfd3129bb6c1ab7dec5270e58dff1. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SEYOK2031051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3491fea0ee23765647e51881cbcb975607fda107f1fde71768f2c1bda012ad. 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/SEYOK2031052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c0e34d767e4be54e527f193f35a2ccd67e179cc9a40ff480291486fae2a299. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SEYOK2225846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3651570a753e1571052b10ac280de4cc6aa242aeffc9b9e7e7efb07664045a42. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/SEYOK2225849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e357507210fa7e69a1b9b703b1e39a6d128387495d40c6c2cb120d0f03d50b0. 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/SEYOK2225851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83be4135a72ef2855620e51b9509942000cf85e9b7d45e50fb1fe434b080afbe. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SEYOK2225852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25989cc416ecb48417ee1cb35248cc233020c90ebd022b950e31943b7f0a659f. 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/SEYOK2426681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4925326659913c44f19b3bb9a8bd43bd21df41848cf011023c9e21679d1f8f. 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/SEYOK2426682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1172752f4c551ccf5c79b0a7b4f3ec79021c4d5f2456db09a2728e79eef0fb3. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/SEYOK2426683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23796f63909d842882095e6b7e9470ae9ea37fee9c39761c2c528b3af3b0482e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SEYOK2426687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ee43f7e1aac7460d2c01f7258a3b58bb8fcacba177985edb3719e0ebfdc80a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/SEYOK2426688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3e5d0773525fa23243aba060c6fbe0cef48d83647863ec63282a7c04d60b46. 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/SEYOK2426690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789a9d5d16678128987c5a329bf64de39f8b3bd22f90a0284f9c3e32fb561026. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/SEYOK2426691.