True north is the direction along Earth's surface towards the place where the imaginary rotational axis of the Earth intersects the surface of the Earth on its northern half, the True North Pole. True
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 0xfd9d07fa43473fb385fea17c6f19977acea41b275bb0f4ccd0be6dd65b0dc3eb. 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/9d1e5039-7d33-43a7-8149-429bbda90f18.json and https://artists.proofprofile.net/proofs/artist/9d1e5039-7d33-43a7-8149-429bbda90f18.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Sky, the Lie, and Who We Are Before We Die
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 0xdffec3182b908f170823e20908d85fb49b7db4a11ef593ad115f273ff3de31fc. 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/USCGJ1778756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8c61ff71fd1e3bc75f6e145e0df4f77e5be0f2677714a6d58c1ea4af8f17ee. 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/USHM21810879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed37c61105e6107739cf1634d71cd1d90a45af88bd706b74ba82130e7b303cf. 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/USHM21810880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6577b303d9e484d84a28763db936c8434e43387d109a0d56c382bac74e51b9e2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USHM21810883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c822d8758042762392e0009b1847a5638069c083c8825e359840e2cabfb714c. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZHN52039638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48962871755277f9bfcf31876669cb9003c39dfa9cff63c6c67db52435d99b8. 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/QZHN52040940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ab6137e3535b4b4bed9bf95788a2116c70585e530793c0063e02173b485643. 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/QMBZ92029450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eaa7c26c407f5897472647b8324c3f083598a1f0fd48e2aefc9642511fda040. 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/QMBZ92029452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb4fea2c4c6aaa3c3a4d4da837b6c88afd0fb0773a0188769920a6b70dd8144. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QMBZ92029453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff31dc9e14268d51c207858835595a9c77c14587892bee224be0062e3babaeef. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/DEBZ72200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6f39277755330aefa8b24e2dac414499ca214d22e81159b8fcc22291d56fe2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEBZ72200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19999192cd5f4d72573870fadca3729968e50e3d5b0853ce5725478fd3b9157d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEBZ72200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f882d19c4e63fe2067afaa83a8cb245caf3b55974f2b0f5387245ffc6ac6453. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEBZ72200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38d86da82847f9dc4abc217f6b5875df62ec79a838f44f32875f119f3cce12d. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/DEBZ72200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5e6a5ca1c0f7bae796105931c3607fc053437be43bdd74c625f72dfd30e804. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/DEBZ72200176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5cb8c66f58a252160d3a94bca594b4677ba472d20a729c781c11113d7cc4d7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEBZ72400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc8ea571ce7759997898aa662f12d102f51e0cf80456e67e121bb7cffd71c73. 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/DEBZ72400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5cb8c66f58a252160d3a94bca594b4677ba472d20a729c781c11113d7cc4d7. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/DEBZ72400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08de985148cf0d1549674630c1dc5b5c27eb11c54a29d42e22482345b51a0541. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEBZ72300175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dff3a432c7cf0e7f71c5a49a5467d3d1a1c9d68cee588d11aaf40390467f07. 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/DEBZ72300167.