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 0x016129227353772a889a8de16f22d75d757aa84ef28745af3f4693472ff58e9c. 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/f8fef07e-37e1-4f90-a652-73f006bc2ada.json and https://artists.proofprofile.net/proofs/artist/f8fef07e-37e1-4f90-a652-73f006bc2ada.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 0x58a34d1e90aa623cd5fef6a95b37bab370937fe089f19c5f9fdec1a9fab64144. 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/SE6HN2056153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9903b1eb0013148182a9d074f3e111f56f3984da1023ca26daeeaf3dd206b72. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SE6HN2091006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa12e2bf4058fac83228edeaee40293046cf3a0fdb4f4fe78eb9352f6f3e316f. 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/SE6A91928884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a34d1e90aa623cd5fef6a95b37bab370937fe089f19c5f9fdec1a9fab64144. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:43Z), 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/SE6HN2056153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53bfec86eddb1af6bc94c94633be51b80218592cf74a0d0795608337698d83e. 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/SE6TI2006484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1fc8299eddb0453397b858b23c138b916704b52ce4572a1d765f36200044b1. 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/SE5BU2336088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1fc8299eddb0453397b858b23c138b916704b52ce4572a1d765f36200044b1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE5BU2336088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821108fd64443fa81cff284ddf40121990eafac0c1896f858fb9efd7c2098828. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/SE6HN2300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6643ef582cd68f22b998293804ebf247571e6df14aa77272b9eea90771da482. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/SE6TI2120806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd638899f432f8a8e71c3da309d2412d252741a12f60b6b474ec2501d2d91f3c1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/SE6I32117351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2242ceadc9d995eba01629744a8be883da1cef50a5d381f809372b9252a72ebc. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/SE6XX2136644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec80047d6aa138382465eb8a2251a83f6463aaf78e5afb267dbb0a9b6e200df1. 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/SE5BU2414989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301ef4d2346c54c60c6c9d388bd19b38fdb494f4062d91f4b636b5e75e60b588. 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/QT3EX2485584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9cf80507f344408252b4e6fb0b1180d5cbf6e39f82bc3920eaa32a51650e99. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F32445393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c5a6816ba60be0c755e1271bdf07feb147014542b4dfc45b7f7523bd6ed883. 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/QZNWR2561735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305db2bbe337588fe512db6f216519e8ba505a5702a8b8f3e916a5749c96a790. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZRP42554835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b7259949712632cdf5327f053815dc2c1b377736cdcce6a15e284e3bccbd4a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTAT2502355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91df7d40018f39aa1c5e6f21a24947c89762a4b286614dcb41f2a05523ec440d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAX2581522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200e3fab3bd0c6b6f95f84f9b840689d014cba8464bc19bed915baf385e1ee36. 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/QZTAX2581867.