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 0x1b47394eabcaf6f21a0285c4551994b294cdea9ce3a30ebb3c6700562fe35172. 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/535f1234-f6ac-44c3-b8fb-2374500ec0c8.json and https://artists.proofprofile.net/proofs/artist/535f1234-f6ac-44c3-b8fb-2374500ec0c8.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 0x58d5838ed18781cce5e5096c449973911ed61838d4dca212048199d446e56a4c. 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/QZGLM2430503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a97bd472217dfee049db83283b8f672ce67c4a6c28ba0da8e2fdadd5b1ea765. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZGLM2430531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0be53ade32943badabc6cb61f03f7d9015e2e24856511fd7dd181aa86c35f44. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGLM2430514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4111d2eaf3647c9ff39e31b04abf9f593df618286f946ef2983cb9313b443c6c. 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/QZMZ92473121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0a3dfe0c2ff61b090e363b715b4bf690540c90f292c036a9faddfb70cc6b6b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMZ92473147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634ce2ad1c1d39fe0385a33658ffdcddf31e9c49f8f4bdefcefd0d8de4a48165. 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/QZNJX2430705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66bd5d27fc12ec8bdd90e8777236153265fcf3c04febe77b93560dd1a96204d. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:36:52Z), 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/QZNJX2493585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8df428a3efb0167fc801d498cb1950afd2bdd56e2be3ffce43f6640a4fd992. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:21:56Z), 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/QZNJY2443869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c6e8ec32b520d33cc9f04c45c5c61c0cad549f6648ae67c69dc7031da9601c. 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/QZNJZ2434593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fc19fe5e2b1399e4c7f6741931006180fe06086bab7c26b2d0b4224b28ece8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTPX2466750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dd237e666bb8126c33c2c7e4ffcefcb231865b4995913cc24ef7afa80e9dc3. 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/QZTVM2472564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4d6beaa97468079ae157b566616ff22f7496a7420c4982322da634e3c545fb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTVM2473317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77378cddeafe3390a2e1c571b6ee9c192d71160819c213d1091dede401cc28d0. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZW9K2480564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c06886cb009d2dfdf68890ebc24bd37913f6ecb8968ea06711ac8a794d4e6da. 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/QZW9L2415993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe6e85d1591184b327e23a4d5f71d89eb206f31b3a728d5929fb39d023a624f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZW9L2416083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b757f739258cfcc63b99f6dc5698bece55f4f677c282f6b7121e997404cdfd. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:55:36Z), 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/QZW9L2416008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d653a643b9034832b476d1bc466d8fc5a661cb4653ccb463ea20115364770d. 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/QZW9L2442099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce087184c8f26ec1d4aec8fe8f580186cc57175ceb0f48106bf93adcd26d6ad. 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/QZW9L2494236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5631f684b90a45cdb7b610980a9a360d35dfa148511687e70820786fef7ae5. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZW9M2424969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe756c20855c9073cbba1aeb7f1e609b343b7819bd0786dbff02da2ae5551e799. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BK4DA2527201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00be3b68883e0fd47303ac5a934120138774030d70d5c237adfbb6ebe6a4240c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:33:52Z), 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/BK4DA2527202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c2c127390bd7f15869bbe287682e41fc5d519b90757fcf216adf7fd8487287. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:42:14Z), 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/BK4DA2527200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dca82c42263fcd89e0947cebc11d0c2d99577f63f2f2f7ee9a37e02e3c7b6a4. 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/BK4DA2527194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302a41fe6caab54c5b672177be05a62ec60e05f130512e52fd27466890f4be84. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:10:53Z), 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/BK4DA2527196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad060e5548304771496b3f21df4b40a522229443f22573156d19f4baf24dc888. 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/BK4DA2527193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f351c671215e24019901fa5f1f4bda30461c5678b55f0edb5a617de241911. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BK4DA2527199.