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 0x535f409ec9fde8c1c665845dea8c8c22fdc6967a8002af0353cf051c777790b7. 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/415f73cc-68c7-4cbd-9dd2-b8586675cc3a.json and https://artists.proofprofile.net/proofs/artist/415f73cc-68c7-4cbd-9dd2-b8586675cc3a.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 0xf96a75b0452345a143ae62c5b25137e2530d6cf1bdaa17e587550cdd0f622d06. 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/QM6DC1573876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffe533fe19a66ae557cfe8fbae16b19630d3faf3f41cddf930bbe3c1c9bcb4a. 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/QM6DC1573877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e763b2a55fb5ea535a7e7b51c191624a6743a25ebf7de5f2c1fb0a065cf6d84. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QM6DC1573882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bf67aebfdff666c22b0447a3554fea7b9c38a962d4335cdf1ace8c90315752. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:37Z), 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/QM6DC1573884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2803a1611958e9084cb5d252c0f5f390c93f3d5f0d6ee272399b0f11bcf6df2. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QM6DC1573874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffe533fe19a66ae557cfe8fbae16b19630d3faf3f41cddf930bbe3c1c9bcb4a. 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/QM6DC1573877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1736fe02f01275cb4f45ef72372e600afcb13556bd78fb34cff0e1589768b0cf. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:45:42Z), 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/QM6DC1573880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd736bebf0cc8789e9067644add7f8728cbdea40567aa163c3dd10954d5bf4383. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM6DC1571293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce80f1b8f0268f4dbd2f891d32e5ebd61d7c8999a809c3f2d6262eec77e4858. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QM6DC1571294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe363c02e280dadaedceace6309c1375e86f6bd412818c794be60a32df4996136. 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/QM6DC1571295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920017675da39f40a721cee61e479e68ec2f5b8e15bb9d325cf33bf05ed4b145. 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/QM6DC1571298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642c39e7f2eb29982b7ee2845cb072981e765159b937e9dfd1aa485ac00e4c15. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:01Z), 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/QM6DC1571304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf93737a2cd0e37d412b4091faa136fff382ded97b1fbda7259799bec62dce0. 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/QM6DC1572150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33539591ff80fd725d5f11251fc2dc92237285046a113d35a7bb5ba3d6034d1. 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/QM6DC1572151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731d26849ea7534a9e1bda9fc5522cd1dc7f23deb95e60c954cb345b9f20f6e0. 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/QM6DC1572153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953d318792ee58a05db73e9bdc7c1a410666b7bcddeb97131d1cdad06958051e. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QM6DC1572154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a195b79e936d2214dfe399d2ad39f903f4fd0808200ef1ba5a2bf8a3868a0c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:04:09Z), 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/QM6DC1572158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce4ccf769504803c242657e5366ff46d5ca1759662d953828185cbfdfbec567. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM6DC1719954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d6fa40c8c1a2a04eb39ae400cc767a2bda536ad9f0d3a89da6dc4875cf5914. 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/QM6DC1719963.