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 0xa200808093a416520ace7439610e2665d2dbb179a754125b72133a7959e602be. 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/2dc89845-dae7-4586-b578-5faab6ffa167.json and https://artists.proofprofile.net/proofs/artist/2dc89845-dae7-4586-b578-5faab6ffa167.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 0x12644fcad873e8b533f8fc55a68edc5aadc2dc0244689ecd52c8974edb53c6c8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CAM5E1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf06d50e91292d057a2dc20ced95520d91e3eceac052b6b4c59d7bfbb865a74. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:06Z), 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/CACFX1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38e0da72ecc035e2c6655edf7229e7acaf570007376286cdf8477f54b9f15c3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CACFX1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d756b549e34773fd03554914020e210a26d2779a44560e64f686b19517e4ce9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CACFX1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e0bde0e76cc22c58648247effaac22662cbba2db885acc7d22f1e1b3a901e9. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/CACFX1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5f593e677d99873c1dbe214cc37dd70085f9f04dcadad3ff37b30ee9365488. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/CACFX1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea016afed359ea3ac00366099c9e0715b56da97c20f23cb2b60b17e1d6a2ef28. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAL641966006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7861e76c835328b2e4f4e7391caa832332133573620565552ffb49244ec3bfb4. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/CAL641966008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361495790c3eb39e570481556c4ce8f28ead7c7233b689d1fdc0f6d93ef76dd3. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CAL641966009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46fbc7c5f1d072242f068c41d6f0109c52ea2b64a904b582d9facf6d9944fe3. 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/CAL641966010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3569c64bc9632ac11860029265af590f2b6bfbce28288ea2916f449172296d0a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:35:21Z), 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/CACFX2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2744d6636a9002c0e507fada1e8e3f5485b67e400987faff3f84ee3225e4597b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CACFX2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20adb53fb9dd3db019afbc745ee35415ef4c6948a0d359a443fd032e1187a89a. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CACFX2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf294c69154c8954d7a00f31ef8e1c47a3745511eb6aef0a7b46ca17dfa2f45a0. 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/CACFX2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0ee2eb38c9b24e526e316b86ae86407568effa87c3717704646b162b710274. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:56:57Z), 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/CACFX2200011.