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 0x05305df054cb3a04f3ad46062798239c4c4c00675c1dc97b63445fdfdfdcb423. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05f674f2-3156-48c4-8e13-7eb13d86766d.json and https://artists.proofprofile.net/proofs/artist/05f674f2-3156-48c4-8e13-7eb13d86766d.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 0xeab3d669bf0f31f346f3dde69b5e7581ffeb6e431086bda1d5a8636b96e52a23. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GBMJG1802468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d6cb8ed29e9e50373d1222df3554a770e22cee01b0f4e141e9ecd211e0f832. 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/GBER71900365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ae9a0c4dd9c9920b2d98ffae74e7bc05b24ef7d1475265dcd3ec9f2a15b401. 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/GBER71900194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff664e276fecdb704c3d5c2c257bcd93665c4b41c5501b63c7506d07e3235ba. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/GBER71900202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32c6cc624572596e6e6d54e4599ddce3461e14f5dcd21de05ae6be79bd1e0f3. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBER71900196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df8ecf559faab010cdc3127f2917dd3a9f4de76a65ff50f1a4667e919bdd443. 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/GBER71900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbdf81cfa7034796992c490615167d02cad2e22683f00b8246203d649a74591. 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/UKXN22048520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee3dd0ac76e81a26c11de5dffd56fbdbc4128d7be2822fa299b7acb999f9f53. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBRKQ2162796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64515c9e9f48310be1d815530f8fb8b52298c8aa266f86efe474cf3f828d8fc7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:04:49Z), 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/QZ5FN2282847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2b2436f60801f15b6a1331bf238a28bd1d8279dce2628ba30e18494231c2ec. 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/GBRKQ2214264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf676262768a6179d3e6726b78569f4fc461f83725a0e2fa95d727f57b61c005. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/QZTRX2200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7761748b143ff1abcdc3a97b316ffe72d28763d8048b06652914ac1b924ee070. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/UKYYJ2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf676262768a6179d3e6726b78569f4fc461f83725a0e2fa95d727f57b61c005. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZTRX2200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8c0e0dae2da1793fe427669fca30b63736fe4f9cc2704b3f3b458d98426aaa. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:08:47Z), 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/UKYYJ2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495a936bb6aaff94a3ff3bbcecc4dd8f3a5c379dcf463dee09c0850dfdaf9eca. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/UKYYJ2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31312edb5bdeed716a9884ccdaa210f3f49f97903016dc55f8c981033659ea3b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GXC932400034.