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 0xe1856161f647a8cb1cb38ba451792332766694a4e637344f7c4c9330b2d6b317. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/390a3034-5128-4533-9b30-ffc23b80cd36.json and https://artists.proofprofile.net/proofs/artist/390a3034-5128-4533-9b30-ffc23b80cd36.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 0x0f182186e7fe6f84cd1825c5067f2ff8cb9c2ff0c4f9a7a12d5f70bad582331c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6Q2387957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e353a1ea55e1cba54a419763d912740b48b76ed42a0fd0a3fcfc0593bbac10. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN62371077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac275a400b1b7edef48ac2828a83a1d2868e35062e6e38881bd0c0e663615b8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUMEV2316410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94fd677dbf3646ba830d06cbb10ddecfc4ebbdc01129def331457b108be9040. 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/AUMEV2313613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae136b4aa71df29cf2d157d3b3950324a08683ea499af0205cf1f062357ec90c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUMEV2250188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f30e5563e0c86b514294a102169450d560521d1a5716f3d93ba475b3d40b00. 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/UKR6V2115367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ef7391f008429afe123488945da449b1d24b08ab29a64e5fdcf8efa5a98e69. 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/QZFYY2160049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a77cce5709db5fed9f9092df14addf3fa4021046d71862f7b69f56ea6fdaced. 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/QZFYY2160040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612e9a960670bc3c5c8f959a6dfb4edb0da2922de7b69687f06e1f1e0b5ffd96. 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/QZFYY2158299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb33d0281c04b6bd08d6f9450a3ab6e6059678bb2f7aa77b74d4542ba94e079a. 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/QZNWZ2011206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332cced29779681d318050db2ed0531646fdb4db932b70172b1d31b6ba10ec88. 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/UKR6V2012756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61038440af93f6cd3cf4d5b5b37727a83d7fd27b86c7746b9e5c5858781e0b9e. 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/QZMEM2088726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d8b104cf3d9c42ee04e70cfc138d180e532bc9a757f31ea1b6ca85bfae53ac. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMEM2088728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1da8f0963f920e3ccdc3f758d13fa550e96a44b27c222352edb788a4a2aa889. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEM2088729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846e8ed4e1d04e59ddb00b66fa30ad76fe5282c826f6be734dfcdebe113f8e72. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:28:02Z), 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/QZMEM2088727.
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 0x9ef566a2b6b069aa5f8392ea4660994109c44e608f62a9682afc617c317cad9b. 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/QZK6H2069078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b5a798500d309379e713f828da2c0e105824a0c4c20007ce040bb574741123. 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/QZK6H2069079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a33bd47cf3d1f5f1f1734e422731b13a4532d6f074e433160c63f5857697b47. 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/QZK6H2069080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b78f7314e5ee63cd7d0f8f31ecdcd3841fcb4674bb1dadf6df0ca5ae8e7568. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6H2069081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5697b23cf157fb447d47e8e5d07f3c1c4906af0d1df22520ceaff40e61dca40e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2048153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c52289a877dd09aa4e44259c4e0126cc190ccff6aeba3ab6f2a81b27c5b324. 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/QZHNB2026032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba8519d1f412e91246443d432a3d34392fbaf91a6df383fa5df31944a854195. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN72049858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d6073346703edb697cad8df49ea6e5084c27b00c7081e8bfb91f28199f9652. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN42075997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536050013b4eefb2e3a3c43396eaed5a5823d2d8c48c9008262d5e9bbb813796. 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/QZES52065780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88f15c581042dd35163062e978b2e7bf6180277a6b369984c85d08c9b630d19. 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/QZDA82077925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a24c9d4e24e2206453fdf1ec09569aece5d30cfd0209141d4e0293834e95f58. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ52043310.