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 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 0xda7f83122b3a26207e6899d7f1a3da704286469c75c5cebfe1cedfab65dcbe35. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/611fa3d7-e891-4f70-b927-aa2d1c697a15.json and https://artists.proofprofile.net/proofs/artist/611fa3d7-e891-4f70-b927-aa2d1c697a15.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 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 0xdfd9ab449d512ced1d495062bcf027f3d726e12ec53ec13ccf3c981b1aaf0e18. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USA2P1944299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecacde4ddc19eb9fc872322db45433af9aebac2b974245ec683e067030a27e5. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/GBLV62103295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ec7f088068cf0b606c96aba9f997d735ea986d7dee1cd3c4ae864a06ba8417. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZW9M2225407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74f6137edfe49e9dc95e0a189bc3542e902d2b6a30dd2ab50b3de9e57c50bde. 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/QZW9M2225408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d0015be64e25501c5ec3ec8683c0a6e5400f9ecd49035fb527e43d654d2cf6. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/BCKS52300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e9aad8c384f0ace2aae07590eca1a2a71dcb7e0b093f05b50973c3a32560f7. 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/BCKS52300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf899950919a8253a3ecd47e0d8ad135b9998735e7307961780fb8b0f7df0c0c7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QM4TW2474355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358d8ffc3279386a7d256d62b573ee89ccbc993aec534030ffac5408026de8dd. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/BKBLL2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc605593a70b0d88d404a2af0902839eb3cc0b9d1768f4308b9a5d461a41690. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USLZJ1908074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a06520d033a6e5c2d10a449c487fe123647c2df6011df1a0da0c65bad335431. 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/BXHBP1900946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a06520d033a6e5c2d10a449c487fe123647c2df6011df1a0da0c65bad335431. 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/BXHBP1900946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8b3363ec0ce431bde11653af2c2cfebb45c990bb85a1326b736c0e2ba6b0ed. 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/CA5KR2132993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1789b89f510f3e34c32ca707ebe899935a37bdb55e8842bf922033207a75cad. 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/US83Z2208844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c7f2e29d350af74e04dc689bcdc4738401159152209bb3d5233df951a9bd98. 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/US83Z2208846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19d0bdc96644bedc0dee4ecf2cbc3822610cf16f02d1144f1e155a2ae14005d. 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/GBLV62132297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450f3f5c01323fb291062262184a24933cf2fd85c3d29b99bb4eab09698e1e11. 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/USLZJ2140320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6882c6686da8d93f97fd21d29afe1f1a20131f62b7fbb9ca435668887f83cc2d. 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/USLZJ2140321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c01756147131758aca9e627c942128cda7c44c901ecfb214b1490be0871d7b. 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/GBKQU2155412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56df5a81739acad6790a53edfafb25f1c0bfd9485566b9d75f3e5b02cfd303be. 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/GBKQU2115970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0535cf98840df3a1f8fec9e7113b0cc1f56653dbe49ba300b789e3c18681e987. 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/GBWUL2056081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71d3228dc1a8551e07ef2279675b7cf667269e0f17dce40d92aab3f38d9f035. 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/GBWUL2000987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652f0215f4bfe8dd4d46ba83987afd28f1a938bee347caa7daf9d954ae4ba844. 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/GBKQU1990410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f773c57a190052e328d609be8a0f69e4c5364a1d66a44bdd45b928f7ef243b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBWUL2041353.