Marcus Aurelius Antoninus ( ;'Marcus Aurelius' . Dictionary.com. ; 26 April 121 – 17 March 180) was Roman emperor from 161 to 180 and a Stoic philosopher. He was a member of the Nerva–Antonine dynasty
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 0x8094e1fa413b2d18a4beb1b2b88af86ad208ad0925f654cee8865de91e52e784. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8767a00-2f3e-469f-9cc7-1ee2f92d9615.json and https://artists.proofprofile.net/proofs/artist/c8767a00-2f3e-469f-9cc7-1ee2f92d9615.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 0x4959d9ed3411cde88ee56a174f9c95574fd0531f261e015b68367a34f9ed9976. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7812179877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2098071601c188cb6f3a617e926a2ae9a7a98c78d5cce3e5ae45042e1900308d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH7812179879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27248c838555048fa3ec354711f8107eaeeba9bb255bcf65bdd7cd138e197b7e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH7812179883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d636e2e3bbee5e9eba15bfeb2486247edc3a5074c4356399b048f7e9a07db7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH7812179886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4043de7d93a2f8b37fad29a9a7cef6b801f836a4d507f12693d72b54d1919a6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CH7812179887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3ecf53bade9e2d6db98bbb6146b2f6205758535c6ebaa75ce9c18abc98bcf8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7812179892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aca528006854329b59176530a650ea6795d7e9c3f9a67d390a222fbb499fb48. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6540838965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7264cfba32998cfea5c5e0cd834eecab9bbc87fc029b6b72f9af9a4fb62bfa. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH6540838966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00520be90403a6f3b864ff87bfa7b8a6ba647fc0772456bddc0b56339e3e41e0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CH6540838967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430bad4b13a8d0b927de7d6100e2a0c2c8f15dc5786182d1b1adc200c657fb0a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH6540838968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ebd4469b1258a2c824604292ee6ff66d03738d16f2837477fe4e918573caa7. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH6540838971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56945f7a181e704ff17b09a037da3902f3c8f00949a139740c3321e9e8f7c3b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH4102010201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8197111792f381385b9742cd2e040a5a08626d4e0d654f3d933f3c2adfdd32b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH4102010202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93813ff4b553f9609cba3a7b291db172fd2a5331545b7c19f53b0953864739f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CH4102010204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bb3dcddf00c95b9428b5fea911fb2c1836e93fbba86c9aab0f45e559fc2156. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH4102010206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cc7af63ed1b36a1ce7ffc31f5bcce9b72290151014ed509cb8dffbcb6731d7. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CH4102010207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bceca64c51f3d89bbd32d315dcc6cb7ed158948211309771b72e3fb3cbe082. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH4102010209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8650e78ad49afde72c86da318654b7a9ac89df5b6d56a3a3f8b85b27c90cced8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH4102010210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fc096362722ff9c4b5252739ca5d48b8c16af1d1c6fce2de1ff998d9150f2e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH4102010212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb66bc80789444a428fa67cb9314b9ee4b92a20640a59b3feff9b111d6da55c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH4102010213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47632eaab9b0de3fe41e94fa8ff498f5aecf882d84f6c0325815877f049a9c1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH4102010214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dfbd1f020732facfd8951201176fdc006e04fc762cda42a109322a76f295a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH4102010216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5964875f1b39580fb0e0be890d27bae06070c51f71a0752b91e7773ff13ca851. 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/CH7812529162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6496ce8cb7b335fcaad18f2fd6387eadf1263cd75d5ed079e4f56d160692ebf5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH7812530784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa02b378f48b892c08b94c6b8b7780e0c952dcf4064fa4030a90ee46285aeaf. 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/CH7812532547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8684ad275ebc99cfa0e5ebb038f73401c7cec6eaeb267cb4530644ef6e598e0. 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/CH7812535905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047f8dbdacee7c467a3ed0a911d71bd4d81e6def703c718f549877544089b930. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH7812535909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cbb1ea186849d82060a31a8ba19af1863fb51b2d5f51e71a18900094036ca2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH7812535910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47aa4d94abac3437b5faf844c201deb9ec4c072a2fb5cabcb60f798e27af5357. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/CH7812535911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983b0fdcff1529c32ff7a65fd24e503f2cf104ded8659be9a3ce57a28114efe7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CH7812535912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006aacbeb3de814b8c53601c2da740f1de37362181a7ddcdf30d62c435289659. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH7812535913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3695d200542b53753e8475abeeb19b5226621a4899d3f52a240136ec3e96fe. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CH7812535914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8684ad275ebc99cfa0e5ebb038f73401c7cec6eaeb267cb4530644ef6e598e0. 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/CH7812535905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5a872a8ce474ce269f85d15a62320278a029ae06cc349ca369b4920f334a78. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CH7812540226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e2503374bdbe6ab6575296df711eb8c44966d5670e519e7597d229c41d83b6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEAR42483537.