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 0x38896cd4b85419922034d62cbedc94ad5942268a27aebfec00f34101fd77f67e. 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/21ed934b-bb27-4990-8d2a-6cc3f9f4bc21.json and https://artists.proofprofile.net/proofs/artist/21ed934b-bb27-4990-8d2a-6cc3f9f4bc21.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 0x9097ebaf9bdf19a30c63aae4c9b9a6f6164870e9d207000389f841f44fcbe41e. 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/QM6DC1694600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666053264686f1a873f61bb52ddb07b313360ecff5391845d0fcec91d1b1b75b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM6DC1694602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8241514c5302bf1872e42548c5d954ba9c1a8031c6d87939826297974c270c93. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6DC1694603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6179962ffe44df4bcc498db62ff424858bb502dc5872cfc973cbcdb2bb8f5757. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM6DC1694605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f26bb80a30e28187ac7b53fab785affbba4e48b49d79283e872b0d681593ab0. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QM6DC1694606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2725f357ae78ad374099da7995fad4dd3f143044c29b636c1efffea50e817506. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QM6DC1694608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c38b3fb8d1b7919d7165769f5e396ab33fa88451daa1cbecc03cd067834772b. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QM6DC1694624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f5c4d40517212fa4127dcb308638f7ed69602ed6a67ccbf8aae8bb0387917b. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QM6DC1694625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf56b90fb8754254d8c4ea8f50322b25dfe78a065b38017fb9e6f32a51ea886. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QM6DC1694626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad77707363aaa4d43381dff1ed8c9809262d095f067fe819c21078bd79c04aa. 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/QM6DC1694627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c2ad6ca0881bd3212433c18fdcab64c6be6cd144e4fb4d6763b76aeb3b7e75. 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/QM6DC1694629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefde93741a2af9d8c091f59d43b5a0c2b58bef49c85c32d4d3f5489dc4d7703b. 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/QM6DC1694630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a8d34f8be44734f9603d6a736933f836feded11e6719cde47a5b6022450a29. 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/QM6DC1694637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928a7b1e21527dc810958f42b66fa25a7dbc8cefa520b4226caff82c18d8215c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6DC1694638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd88988099a99a16196b08c89b587815a7bb5aad48407c181ca9c78da350c8d. 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/QM6DC1694639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883e65dd64b07ff522499dce6b7e7db128c6f1256c9b33dbf294765915b05893. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:54:18Z), 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/QM6DC1694542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5c1b39c6b5ad230b145965ae0c98f57d2c235ffd20046787ebe1e3fbb90b31. 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/QM6DC1694543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3869d811f75387080765ca729b350d0a86af9808f86221a66a6ffea8fef91081. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM6DC1694547.