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 0x2cc945c15d49bcf827c71e13fc93e6d8f97886f9c8888c89d0e455e634970239. 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/cd0d4092-f188-49bc-889f-883cffabafd0.json and https://artists.proofprofile.net/proofs/artist/cd0d4092-f188-49bc-889f-883cffabafd0.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 0xcd24c4268ec7bfaf89ee69f316fe6b02e5796904c3ebebc8f59e16e38ecf35d0. 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/TCACI1573080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d87e7e7db53edbd71cd14cb3496fef1799ad0c348c95ffab2ec623ae2a02030. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCACI1573090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31e708c1e99c76025f76049c51842cb3b0041726b482eaf164dc51624f713dc. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TCACI1573091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9f0e1b952db767418b3358d3170fbec37335b7d85b85bc7dc543fa569f1c6f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCACI1573103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf5108e7f77557dea55f26d6973aaf6ad7b94ac430e26afc23086582f0a0bf7. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCACI1573105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c02654055cf6153fee2014dcce6bb2bfe48a6eaf40c251c85ef5e6293c0f080. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCACU1670920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5a45291e96d9705948285d504649b2bb8c2b18a56b3d6a251f189d17fd915e. 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/TCACY1717863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154677501f501e79fb70bb3347d24833e8eb45ef1ad0f50d5b98417d479a6b75. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USL4Q1719946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8700181d23a5c09dee0fed73a1e6d03d5b1d593e2eaa953b4ebd0a7c3802cafc. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USL4Q1719948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaffaa219506192203a831156ef3ea5a41b924340dc3de14530a26e5221b6390. 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/TCADA1725404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438db7a6f4cfdea0a69af6a8d9df73e4ab85c8a64ec65ba46390c38d2783d356. 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/USHM81873450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6c480dac3452e87c69066cbba91d091ab77ef60e70320d7d13a6b3b67dbd62. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USCGJ1969619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefee7be52633998e62d922680b2ca05ef78d051f4081215aa25d267b14e770b6. 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/USHM21980753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ca78ecedec234e59ea082038d74ac1cac54c2941407a9d5d0dffc9203293ec. 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/USHM81952628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b0233f28113b53029ab48c69d9e6e0e627c5ed830b7a0e81c37ed8953f53d3. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZHN31972402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad0ff96aaaee90fefc76df11772140215e9ba362096a9e3806baaa84f064850. 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/USCGH2010619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaf6736c9d3efb2d9462a797250a169c641f3bc13be4c3dfffbbc3780a1c30f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFZ22075277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9c73571837bc0fb802454d783d149d3358ef2a9ba2031e842c7dd3b1096292. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USCGH2035853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddb9d51380d55515951eeb42e9106d0c602d60000819dc33d68fecc7ff2df21. 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/QZHN42099164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73af4f1684b64e6d2065763cbae7141558c7ffbef64a886facfbbd4f6b61cc63. 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/CH6542257313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fbf0bba3de59b963b89b1d9df82b826818d3756e067ba92bbb5a8bd3c2cf87. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAGU2346256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417de50d8bcbaf86ac312209ecfed535853097f55b75bc57d81f16dc2d464e15. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/CH6542505416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9739663801d2b7a38966fc5f63685dd8544c9d12c6ad6b12265ee27be990466c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CH6542578307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984f2d0393025998a9ece34a52b89229c5991d1e9e2c3752af176e1d52932ab8. 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/USCGH1808398.