thumb|A symbolic representation of the Crown, present on the symbols of many institutions in Commonwealth realms The Crown is a political concept used in Commonwealth realms, analogous to the concept
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 0xb23e606ad9e967e32bb043e5a47691cf479fcb9f110c0779b2469ce8f8b82e39. 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/1a368398-5436-4649-af8d-a32f582dedcd.json and https://artists.proofprofile.net/proofs/artist/1a368398-5436-4649-af8d-a32f582dedcd.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 0x592fcb12875f9267f3e702953d24b671db9eb7564b027c0872db5a5a660d5ec9. 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/USMBR2014604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246b59dbfe5d429bb4bbb755ed5e8d251d262f2cd582c75e781d277adac1adae. 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/USMBR2014599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf84d43832bb7b4c8ca79b8088e4744dafae53a9839fcd3bdaaee0c84103527. 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/USMBR2014602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23abfa107ef6e2a22e6bc267350eb5c09731c1c1839c05bc9df7b2a678027e24. 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/USMBR1812848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e61dc137218f942766bc74db4f50a7447efe0126e4aa7e34e45ce573148471. 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/USMBR1812860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f015ac9e71af2c3d0f62acbdc398a1ba4119319de7fd2a24bfd593214eb5051. 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/USMBR1812853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27798f852ec1c8d57044b4fd94acc71fa44922a64baf9a63ce8545338361186. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USMBR0501428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ab32ebfe3f7c51753726eef6cc90e9cd3c634d1a91533f1b13ac1adc689e69. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USMBR0501429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0268a3c7565fe4e9c2a9106a9b49329088f5a9a0ed64dba7f4cefc404038fc7. 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/USMBR0501430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8ad2b64422e7002a5071b807cfaa1c56695c26e10ca9fe9675caf906543425. 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/USMBR0501431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3c2cb0b9c8a840f1a9eaabc4a5770b7e6b9d479782d87e84421c492aa8ba28. 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/USMBR0501432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e581ce347c2089f1684ad8c033ae449719db99e9541339f672d7f7b589fdc07. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:12:27Z), 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/USMBR0501435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e69584056077867edbe06dd31c83f38c2fd88224eead66769d45e2ab554b9c. 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/USMBR0501436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d42fe2404b8928c0d4b0931c1e2b15c289c8e49a4d4dd3d2399fa9b570e741e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USMBR0501416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e8f8a072ed1b468b97f02837eb427c2fe306431de5bc3ce0f5237fa1c101b1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USMBR0501417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca293251e066cfe605a094ffbfc2d962e1be18a34fd67ad4ef5bf48773cc971. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USMBR0501418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec196f9c43de463bcd24c1d5138582aca97ac8d2caef7aa3d70a37a2f456d79. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USMBR0501419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afc74a84e1fad373a257f125a491d2d3396923de50ae38bba1b30c0b003afd4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USMBR0501420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6541ed92595b804772c547b2095884b4a775f954293c8735d64475403bd945a2. 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/USMBR0501421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2100f022da93390d4e0c611146b17db437068360dd0797745cfa628194d6a4. 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/USMBR0501422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822b3c1b503d25f26fd18b046e38cd8d4ccff4e065ec34ff7c14859bff55006c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USMBR0501423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbbe38e70a43ab343712d2b7b6e3dbb87ac31401f39b1eeeb4323d3e414e98d. 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/USMBR0501424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698abc4e639be057e0d87049fe1f264fe314bc8ff2009bf910c72d995866cac9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USMBR0501425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5279f31a388f66b2780371f83b1257a410f945069a1143e250784c842482f8. 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/USMBR0501426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc030e4d6afd8b6474f44c82a32e005de4257e1b821d5d2cbf95b15fea9b2e69e. 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/USMBR0501405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9eb292bfc49eef97c2eb293dad427d86277642845d47fb2f194dd663f494e5. 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/USMBR0501406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff1b23061f6414eb25dfc65318a6c8f61976d0b43ff56a9d73b32005916fee3. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:40:10Z), 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/USMBR0501407.