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 0xee48fc2627b809808e7d4c5c15180633f2f102820813ee05bd41fff3e8b857cc. 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/50961bcc-7c8a-46bc-b044-d91172cf51fb.json and https://artists.proofprofile.net/proofs/artist/50961bcc-7c8a-46bc-b044-d91172cf51fb.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 0xa3145f32e196f50d49af2086cd1de29ea0e20a70383f79c02c03f8f58a5cb6a0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZA742322024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54aa8bae32425be9a98a0eab8ee745b07fb467d5fb178545dcff8275aae5cc57. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/CA5KR2366990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ed16ae972200866e7ebbd7e58440e98cd8bf98f5a5e80fb8ec6ae938b9c65d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:02:33Z), 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/QZA742322019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2972dd08cbb146d98673776b38be9a0ff143d98284619652f0fcd1f049c488. 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/CA5KR2419419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7777564b2d72a95ec8989cd2e484b81122545b3637370c4cf07c033e784ed991. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZA742422184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adec6e1186ffd010ef412fc4d190ce2ccd2937e9d7881410ae85d0f203e8791. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZA742422199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b92ba877f9546bbc5b603bb75f350904c20cef96fbbebb8e7f2a25cad111c57. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CA5KR2434510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4833e2571afb5de1f49362a3d1067191b9668cd9c32d32a5ea9871d1f62dbff8. 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/CA5KR2450063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da8c180f5d38a606700e4e32b924c87435fd540611213e6079dd4cf57290ae5. 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/CA5KR2443274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571719698c744ff430f149a12878e782e64f444b4e2086775175c621c738cd97. 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/CA5KR2452617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f381e201924c019f7f281f8283173abeb88bea692d00433224b4daee179e7ba. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CA5KR2456679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6600cc5a9814b80f5ef333b102c78b0b5d736cb749870e8631ea1d3a70fda26. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CA5KR2456686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebb049cf71bb215d53ccba5daaa36f80fd9e895142b6634c108c3536c450f0a. 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/CA5KR2456687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2977948f4f9cc8e7bb71f9c17814d7cb4e6e70bd6d1599a39a1de24d473e0a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CA5KR2456688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc101a19a9cac3eae594ee0ce17f54557a2fbed665a50ff0fe77190094023b3e5. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CA5KR2456690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd762e298d981b59752b3706eb0501a86182a0adc2ff04e2f86c554cce5799019. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTGW2400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5de304b11a5552243380986b8482029006fd205da7167354609b1b29a3c017c. 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/QZTGW2400672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f40ffd127bd222e9c06acf0cb9c5bb191a6c0e54bd63c8bfb713fb6b8bf574. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA5KR2456682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da8c180f5d38a606700e4e32b924c87435fd540611213e6079dd4cf57290ae5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CA5KR2443274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769149a7f4b57ab5c1a15fb8a53cd2912872df9bb7c0af038045e2397ebc8e3c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/CA5KR2431780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59d0dd21c095a828ecccd50276ae738e3f5fa91776ce9c3637014f89e056ebd. 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/QZA742422186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55632e9e64ded8ad1c854c9d75ff0073378b566abf3683dafcc377bfc7d0b2c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CA5KR2438510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571719698c744ff430f149a12878e782e64f444b4e2086775175c621c738cd97. 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/CA5KR2452617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadb4d1e8fe22acfea2522c56b3485a6388cb48f1fca8c92e2dc0621021bfbfe. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTGW2402059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc128897aae5e4432cc6024f2f283e35b9d2c26218f222836b2428761b3eb7dc6. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZTGW2402133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe1699cda441e999913fa43e6899ce86014a583608b5a9b1d3bc51e1cb79a1a. 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/CA5KR2456684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54f8ef48dc727044e4b52730875cb2c1cb40071dfdd396511ea73a10b9317e7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTGW2404488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09e041eea3e783e660beda2fb48be4d88a7b42fe92b051cdf93e52c5299ed52. 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/QZA742524466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd160d1ed2d4a1c7b1cadb4484d98c6f8ab75f550d61cc0aa5b9408caeacf2284. 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/QZNJZ2347913.