thumb|upright=1.2|Fiddlehead ferns thumb|A chicken dish including fiddleheads thumb|Fiddleheads growing thumb thumb|Fiddlehead sculpture at the Saint John Arts Centre by sculptor Jim Boyd in Saint Joh
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 0x6c88948247adf537d8a50194320df247bde5a32bb2a93c910ce0d36996e51d8c. 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/421df571-7e15-4424-9742-155f16a4ea6d.json and https://artists.proofprofile.net/proofs/artist/421df571-7e15-4424-9742-155f16a4ea6d.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 0xfd2c63d7451ff665c306bb5a76706acdd3f135998115286f0dc0633ace5d633d. 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/QMCE72325901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517cc98640fccd30c9ceb2f57c281da93106e9bdacc347f1a72e97cfbd2ea754. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMCE72325902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6871ec693f918ec10272920cf138b092e41f5c664e537901c039c23d91fb8245. 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/QMCE72325903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15722ead888ac259a232d4729a5d229ef3d1e0b514255985f3941230ca3b554. 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/QMCE72325904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7b42ae11f34b17c757362c56761ac26be361cd6dd0bdab086c9f483a8cdfbe. 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/QMCE72325905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0983b284d31544d08ebc2807e5ced4cb85d1fc26216d66b792aabb5dbac54583. 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/QMCE72325906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3672933c72c96ea2d2739bc2e5277b777814bb94757d0ed95954baed9d847fa. 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/QMCE72325907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8576b824ac806f39167bf2c59a23eee22770925470e3fbf965a36debba4d4f84. 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/QMCE72325908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e207d667080c7d5729b7cfd8c6ce4cfe5f79365593a5a4ef3e0b96918914b14. 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/QMCE72325909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12742900817709ba42ae6f8a0c2d73b40bb63e58835257c666185653292bae26. 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/QMCE72325910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2091d29fe89f5ff4a0f437f2e1d14a2e0b08e1c208e240a5f1a2f7ec6f9aec4b. 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/QMCE72325911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65745082e4f9da6f7817ac4332d353c1108d3b023ca38dae1f9c5d06dfc7349. 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/QMCE72325912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280ac92772a4b0df358334178f2ede611b6724fe07d21920663a1d8e0440fb97. 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/QMCE71302761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e4a27f4b00e9be71d9b954131d90a87658fcc9dda64b030df67b251a83e992. 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/QMCE71302762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327117099201cea1a94164dd5c993a8f09d0ece691fe0ed2a7cc66b6e56422eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMCE71302763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4627595081aa72a637cd7a3d7f75ff02f5258c8cf731744561dc064da5251b76. 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/QMCE71302764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceeeb21a54956b32689790bd59e2bcf715811e7bc151e4021fbc078cedda1391. 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/QMCE71302765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd495ee40fca6fa3d62f636482aabaa9bc86abb1d2f97b08771c6c4b5f4bcaee4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMCE71302766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c90c6650a85e59083f8bd73a9834b176e831d3768b8b2aa83797901053f97eb. 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/QMCE71302767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd98ab2c8836afbbdb0c2b1f8dab79c08851a45daa871d52859ffa38c1b56bb8. 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/QMCE71302768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fafcfcca5e3f4e9214f226407e135bbb59deff971a9ac3a4fc160319d5c383c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMCE71302769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fa7c393f63020dbddb0a3935a5b85c9f433326ed54c2dc4b5c4cf9ce922222. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMCE71302770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0b4f2168b9671221b15aa8526a938b9366713ec97973d6b27d61ab0ad468b0. 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/QMCE71301918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e878170764b675b00599063f336042518cb3392dd3e2207d49be1b4ed1e198. 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/QMCE71301919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83428f1bf3608ffa52c8e5621162569ac279ff77826ed0ec3d2ca5e6d371af10. 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/QMCE71301920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b2af0cb39bfb95dddcfffeb03163284ed9bfe530dc19ad101d545fce7cc7e4. 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/QMCE71301921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd606ad95cede67d311eea27319ad407f72e69dc6757393f152fd1f07894a9527. 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/QMCE71301922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31e65cad78f7323b046cc032b97b2a2f2dc7680799254acffa71b534b33c279. 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/QMCE71301923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2142c8569070f32c40308c2907730f27694b4332044d13b5e7de3df8f5f17e42. 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/QMCE71301924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334b9a1cf3f3803fa962ac711cd7bf5778646ddbb48509d8491d86f9e1dad09f. 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/QMCE71301925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313a0c3f6f37e1281f42fac635962e73f9cd5168b55eebf339924f6b19d207ef. 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/QMCE71301926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc064ad064b3b8261bcb8e84c2a1ce3fc693edd06d032722fe86d3a5665305ff2. 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/QMCE71301927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982bebc8ec544c86aa3f271fff92ac04d3dd2efd00a6f77e6e213fa6f286d663. 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/QMCE71302465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8124866e4841352006a19c50e28c9dafb2630149367028444625645bdf9b0e. 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/QMCE71302466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62200f66d09886455acac3a64ba1df9e4fce508dab509bb756cd7427bd15d016. 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/USKSV1503601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6c448c7c298711ed92dde31a9acd0030567e8c5cbaa9cc6d19bf0420a2943d. 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/USKSV1503602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b09b5ccadb973d14548ab7a729717719989dba05ce294712e05e28b60fad4ca. 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/USKSV1503603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbc2cc552cdf08335b3aa125c4b435b22670ffb79ee9ac3be53f8d00d9437e4. 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/USKSV1503604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddaa57e62d8db776122f05f925612eae21573bff8f9cf1ecec694600b3c0e45. 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/USKSV1503605.