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 0x11248f19f542718d58e801ba0bdbbec23ad88862a27818ce8316e86e6f499f31. Chain 2 (Bitcoin): anchored in block 953860 (2026-06-15T23:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03e689d9-5f8b-4708-8cae-184517643ecf.json and https://artists.proofprofile.net/proofs/artist/03e689d9-5f8b-4708-8cae-184517643ecf.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 0xfc6f284b7de9661ead2235ecc921307f5e89e7d6754be48b83cb52ddcd997557. 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/GXH2J2541993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02cf388cd2d3e1eeeb831d7f63d433743d53f71a7b015243a2c124cc9cf7134. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:59:46Z), 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/GXH2J2541920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e7566eb14e7f357d93db858898320420b7ad851db807746a5e1ee942eb1d58. 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/GXH2J2576264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc19732342ccdfd5815ce1c9c1c00a227751291cde92b907cb50d37bcc20721. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/GXHAF2537470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4551796890bbd6df55254846f6524a0b248b7f0866afac6cb732682055ef44f2. 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/GXHAF2537467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd5ca88bf1d0ec5aaaedadf8082a6e685c3c0d3c35bf83a671c87160d1939e4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXHND2525878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc02427bb2bbf42bda4c44209464fecac79dcd0219e8a4298dd45e4233a5a2c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:54:42Z), 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/GXHND2525879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1486527fa0b033a51443918d10e9061fc28be6a87456c01dfd59940a0b2f094e. 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/GXHND2525873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2447981b62bac8b0afb226e64245c3171f973178365b5613d593a8d84de4e21b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXHND2587285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c8d6ec3f1481731ad5aeb74b1cb625d5032cf1faf8bd4fd87b146fb1312a3b. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/GXHND2587282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d94bd8a4f9ef0ed33eede73e07784bd22bc2a2a9668111d22424ee6a1f8823d. 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/GX53U2645021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c3b8275289dd6b6dfada10ed4398cd19cf87916ffd9dd73e438c8cdd57d7c2. 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/GX53U2644999.