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 0x5ede2f196d31768b879ad90e2291254e17554519094c02ef3006b6ed40e7ff51. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b717505c-4798-4634-b245-00ca1b58a30b.json and https://artists.proofprofile.net/proofs/artist/b717505c-4798-4634-b245-00ca1b58a30b.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 0x072789e317bc00f202dc85b01ff440e548496b69e17f438541d237519377a9a5. 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/US3DF2233868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe4df14702ad0ca037641af97ec63437b62fc403b4eddc0f987dad75e28d220. 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/US3DF2233807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dab3cddeace60fa0b009b6087fa45f9297d47197bd9b821cd5330ff5afb9fe8. 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/US3DF2233799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9524e7460f1900ec9193f49207e0139dcd4574327b0df95d7abdc1f010121de. 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/US3DF2233880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff135f355f4106a18b69d23f7bd7bf7c881bcf707570adc795365d289ea1f71. 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/US3DF2233866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a872cd49475a97cbe4001bdc5861ce56b8e373a5701386a2e103fafade1fb78. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2233870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c5237c8135a728bbfd97139b430d6c8038b118fe68a93911c70ff54c779786. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:52:53Z), 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/US3DF2233876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25148459dc168c2ba3d77d63a46a5a5e17445a45bc9d6ba1d837f57ff3c6d35a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2233797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33614a6e269cb27d22ee1018e2dac8dd06e9777139cb93880a3fc4a09792ee4. 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/US3DF2233869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479bb47232bed601d03189e111c041d2965be919ed949e9e24946a605631889d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2233800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf0b5d0c95e4b5bdff22de2f7bce749700779fe767cfa859e7bc65b6196fdb1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2233805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8979eb2f79bd54137e56f4c97bd864277908970e975034628a232ca7de09b4. 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/US3DF2233865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493123ebc5fd1613deeb623afb96d0c3a371f4bbf0d257ca0f35a76fd9735c41. 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/US3DF2234962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bb4aaa940b9e04676067c8911daa746bf27df28819d8378f257199a5640f98. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2233804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901e62fa19eb66893684da72beb1bbb36173d8ba26f3e5466022e442717657a5. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:26Z), 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/US3DF2233872.
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 0x1fbdb1720e21025576e1cf770186b7579d97fb846d8b949faf956d2c2943a15f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/US3DF2233798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06c2b258028b8add26b33a0c6c963277422ddeb00eeeb7be2505ddf6f7a3032. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US3DF2233803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4521aa8d84f3ca788ceb39d153de8257f526da1fad3cd2cc3fd58aa949feb49. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US3DF2233802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfd31e173f5be2dc4136df8e68a214b789fd5da6c462cce80ed1fd8674f931a. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/US3DF2233873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5764c923371b96da3d2cb4961b70ad5280bb22c7fefd680e03a750a95b789ed9. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US3DF2233864.