ONL may stand for: Online, as used in text messaging and academic circles Orange and Lemons, a Filipino band Order of Newfoundland and Labrador, a title Outer nuclear layer, a layer of the retina
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 0x923dcdefe652e5de60c573ce737fb3e6e54198dca0d81794183a7f6f0bce1849. 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/080133f2-8769-46f0-ae23-2361ab357b3f.json and https://artists.proofprofile.net/proofs/artist/080133f2-8769-46f0-ae23-2361ab357b3f.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 0xc743c9221109b52383f7a8fbbd69e1316719efaf42bcf39955652e36da9a8dd4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GB8KE2311801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596e0887d5af4196654888161ae96c711f9a50003b189813f4255d11e7d05d77. 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/GB8KE2311802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea3de5a742993e7d113ab1be3ba12179181e0b689e7c967a529832aafa70d4d. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/GB8KE2311803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f570056b68de89300b0573cf5341fda80e4e412dfcf3fc080aac56e7c182f0. 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/GB8KE2311804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38be86bfd584776596393b24948232e15c7e250c6aa373bbcbfe95774074845e. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/GB8KE2311805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a44ad715c358c2d2113c46244612b0d265a6dd0e80544edefe3b32d10a45dbe. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GB8KE2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadb4b2b835280107f4410f37bf7280d1e6bd9f1c6b3d3b66c4784b73bc82a4c. 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/GB8KE2400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b9789ea0c20fb77e23f00801142fef31bd9b0980b2e75d64c5cf7209e7379e. 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/GB8KE2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7562a70b1c05704ffa4f656af561c57f75063967e6d59028ead14901f192fb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eb509c7ee9483dfc0690647ae1a355a9fc6a5f9d9cec3bd00a8a01954f4bd2. 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/QM6MZ2423939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693365db954ace488cccb56eef4e26f98178dd4f32cfc963ac2f327a68defaee. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM6MZ2423941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c49ca57c91ec5dba56fed82d3a838095c2c90deac06c5d8dd860df939b1baf. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QMDA62469939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0d60560cafc1c3c3363c7a2caf5af3c7bcd471da4588d9221b4e92952783ad. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA62479568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf981c05b1e55f8572663b5b3d260ffb4f858ccfb54d7a16410c2e1214af4ed5b. 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/QMDA62479569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0eba154f08e8772cd549136576f92591118d28f3740823021840060179961b. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QM6MZ2539343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962638bed35179c08e75ebe30b5018942ea74a2cf19bbb67548ee0317d89fe61. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QM6N22592773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2ba23207370a80d1af05f2ae61217a72de30d3b8e080d530d8f2ea34d881ad. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMBZ92541010.