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 0x1544f147dc238d3880fc94ce8d58ce0931aeb25a6da38bf172beb3a560b73355. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cf7c4d3-0478-46af-baa3-97fbbfed352e.json and https://artists.proofprofile.net/proofs/artist/5cf7c4d3-0478-46af-baa3-97fbbfed352e.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 0xeb87f581f119093d77331bc6dfe4dc49fc0e82d460b2c8a342754831e2a8f166. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/NGB5S2500471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1022c3b43d2ceb0ac36e4a50a84f017fc9757826e74a55ed631223d82376400. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/NGB5S2500472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dc81b3f4b5435599cb72b93d13f5cf0db2d007f4481cbf9cc88a070db49f6f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NGB5S2500473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3e229f4fdfcd48e3f42427774bd4f850eb826c0c284f41677939a1a70f4cb6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:26:44Z), 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/NGB5S2500474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21cd0c5ca428163d123f0c139ad2def2dedb31d8d22942d1f955b86efa9b862. 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/NGB5S2500475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09e6e58ef0bffa188d5f84240923686ec7d4f4e31fd5f3990f5feed8ddf2ce3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NGB5S2500476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94120ca80ce366731e3c5787a45925aac242f8fb2e3009100fc20d1e2be84bc2. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/NGB5S2500477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e31cb9f5883be9d95d34d45f7c2bb4d870fd9177ebf846f9e49b4cfd99c9d0f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NGB5S2500478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560a585f07bd1c80443907fc632f881f1d61fc684e45b3c63a2bacdd63886429. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NGB5S2500479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcf8b4cbb58e63461f264ffc345709583c0f4e59cf1e2cf8f96b71dc1a747b2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NGB5S2500480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045e50029c146e26e7aa93f6e42feea5fae7af17977d79b8cc706b6693d81ee5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NGB5S2500571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6404626f036cb8545aaac4df4eca85b60d9022b1d0a867e98e88aa69f4469b5e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:57:00Z), 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/NGB5S2500573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326da3ab471debe15200baeb4804cd885c480abc84012da4e4f0d9852ba5e448. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/NGB5S2500574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b9aac48892fddd201bacda06161ac30c8649b0bc1c09bde5b607aeb9401a69. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NGB5S2500575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345b06b275d89e9507a548f800e4db2e4578688e0ef9c6bd0cd2d41051fb38b2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NGB5S2500576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d052754ccb09a111c0a44687dee5105271a58043a1ea2c2f2ebc3c28f470d3a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/NGB5S2500577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf0c32044f203bc1216dc97fb5fe5f38049fd75fa1565e59f8ea5918113dc3d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NGB5S2500578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c28c37ac0fd3ae13f902d3826136dd91fd04d2ae282935da02ff27fadf81376. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NGB5S2500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e32d368dcaa5914aa061c92b80b70f51abc3136a31a64189465fd5c645f7898. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:30:44Z), 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/NGB5S2500930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27dc02a697ec722b2b225d9cdca233d94bd9c6f03cef21bf7f08223f38e062ec. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:09:41Z), 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/NGB5S2500931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9acfe2c34e008984b3a3ea38f214b7feb6dc4bc1855a5c947f318a96b7928c0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NGB5S2500932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b2f7adbd9063ddfb1a5a271f245d9025dead9014c911f227571582e50dbf4b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/NGB5S2500933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01538dca2994c8feea4a6b1abe61120029da8d8b30beb18b41a8826af99128fd. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NGB5S2500934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd528e2a38a7ff3a27504298e059231e003b9090f4ef2b0805cffdf5d2745e78f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NGB5S2500935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0760617e67a3ab5954b26a8c5695036112d006749e595d8218ed259116756f6b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/NGB5S2500936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9df299264f4fcd1c21bf83908383a860ef15718a0383e9cd4113668e788c06. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:58:28Z), 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/NGB5S2500937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9032ca7024e9f3219b9d04bcb14c2afe6f0370c5c6606217d4024038a29b0a82. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:48:05Z), 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/NGB5S2500938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c657d3747aab21578409b47a0d788de7f0163e4e3fde6b85c65dab3458f6f4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NGB5S2500939.