thumb|A sculpture representing Ethos outside the Australian Capital Territory Legislative Assembly in Canberra, Australia Ethos is a Greek word meaning "character" that is used to describe the guiding
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 0xd17376675ba4796b3c8e14ca1345af09c7f08033208e85bb39090f658c67a9ad. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e580e82d-0995-4f21-be9d-9bec742eb2cf.json and https://artists.proofprofile.net/proofs/artist/e580e82d-0995-4f21-be9d-9bec742eb2cf.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 0x8d50bd5969ddae700cd78191f3c9b8028d6fff827d6b3920f4a2d79218724d96. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHNA1985613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96776840c3b84e363467c3d93061c05847299eba0e148eb8e1847d30f53990dc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:38:15Z), 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/QZK6Q1907431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f1bcb30a3153a510f2468539f284d6ecddd089283efc0003950147d28f9585. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZFYY2145775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfe824d2bbcdca11bfdd3c2c99f86f3c761a8d679f6c9b012e0acfcfd2a0400. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ITTEW2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce88f48b43524e4851877be8d4fc9c5f26c942e6668466e84acdc77d02a02da. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/ITTEW2100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc524970e626fd5e129972e92fa2f23306f5376a47360941dcd2f55f074f69a2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA2P2226934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee5f86fc9844924b2272e86a360004d19aef382284c2bd0a02686c51162eeeb. 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/USA2P2230842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869b0a3ca4c72cdc63a91900f88c7ba1a59045d0dd790dc38a4b9a4bb1a5728c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:24:00Z), 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/TCAGS2368174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f1e23dd8867bd4cb6e972b7a6d219c23be1fd83cd31557c2abeabb34f1d189. 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/QZES72359405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5f4ed1ea61a5a41d095d0d3488bd0d95d574bba399bc0dae1f5132ec153f35. 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/QZK6M2341138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7167eae51d2caea0a06f74fec5b7969c08456d85cfc00bcc56c9b8a5f2e5c7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWQ2353807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd42367989745ae0e5cf291874527ad1954a5ea3bade48aa49f435018b36a69f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US38Y2400910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ac6a287c7d07f85a6b05fd128773310103c0e69f74d7f8517c6c4adfbc7ef1. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/US38Y2401180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1838721069e483ac1e1af3a884e2fa9ace0389f7010050ba172611ed9e970baf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX202364142.