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 0xac0ec0ac9d85e9dbb5103781f30e5f977136438d6605e0eb93f89bdc0deb179e. 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/34d3cff6-aed5-4e01-af05-8e47bdb5698a.json and https://artists.proofprofile.net/proofs/artist/34d3cff6-aed5-4e01-af05-8e47bdb5698a.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 0xd52d9329db3378bd8ebb683a197e0aa80c57214c342fd0dc1e70abf92e8d5b1c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:48:50Z), 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/THS080601419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df9b6e64b2bea06f5b6319c189d5c6ea07fce0b5643bcbd93c7ee40e3c902e9. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:31:05Z), 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/THS080601412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6400720d4b798b10b12b172ef580b4dc6fb5fea1ce207c76f08e452d03a374a6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/THS080100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf83a89aa96ff3ee484ecc8c31dbc27b9bb6c20e8bed4f7763bd89c41118f971. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:50:00Z), 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/THS080100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccd75bc9441f7da50afc27ad9ce9e736bdfa8da0b0e294e465831909937a373. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/THS080503410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d920751afb31d5ac4f57f81cd144f2c714bb38d8183683dc7a222b643f2a6c3. 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/THS080601411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399d24fa9cdf16d68afc5d4ccd2a2ed573dd2bfec18ebbca45946c0576e444c9. 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/THS080010105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eeee3a3ab1371e490f712ca05a543cbb27d120f54805ab70ff5bba24a955afc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/THS080503422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14585663f43f99874ae1c38430416c77dbabe6d08f45f5e203a3c73d4018f16e. 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/THS080601423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de68dc822292b986d46c3308e7dae76783618575bf6e1f7755b4926aaab592e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:24Z), 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/THS080010112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99821ae1c8d0ed54693750b5166c720cb547fc4c8c4fab6456aea2291a9b013. 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/THS080100213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d850e07db49b3db3aaba423bd6b48995b406080fa7cd28e8acaccf1648de06. 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/THS080100214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd61d42a6da7b4bf4a392052c37ac06282105fc454c3fd5ede095a9ace3b508. 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/THS080601408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bca08cf4b63d1641f0c02b8e073e4e149d00760b7d3a38b594cab8cb8b12d10. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/THS080601415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7929dc5867dbce3ae557ff9e15088932140976d8d0eefb96c5a0fb9ce5f9ba94. 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/THS080601407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7929dc5867dbce3ae557ff9e15088932140976d8d0eefb96c5a0fb9ce5f9ba94. 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/THS080601407.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f3375f7063478a4a21d4628ecc1bc385343befb80067ccfa314f40445b69dd. 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/THS080503401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa439d0e00db1d5c69af8903d8c40463bfee3ed8c85d3c5eb5fbc87349ba63681. 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/TCABR1356697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81a76b0fd2a533e9d57fe830acb10ce1ad1c21a428bbc4847325c2564d152da. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCABR1356702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8457f82e5dcd68b4bc3856a810e25af143745aa6429eb23513b409e473d9f03. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/TCABR1356731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cecd7cd516b9d4eb0233eb2c28dd8a30e369b4b8b1822831873d96f886cce15. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCABR1356739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd61f6c7b64c19194f9c9497a7f656ead03fff04b87cc0dfe64cd7dfca40f1d. 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/TCABR1356741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb37c4bcbd0ce96654e07fbd1eafbf0dcf8eb1bd46b2e394ac1bf77f372b92c9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:21:13Z), 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/TCACR1608391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128500bf3e8df4aa3cdcff06736c9e5f3f5fae2b6d6ddc830f7b71b1f8eed23f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCACR1608394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea91c2e5141e9c141fb890b92d4c10986bf805904d4622b8ad706a6f9adf95a8. 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/THS080502905.