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 0xa92d4d87e2c387c51f9bf288a3a92a42b2094a7d0e2be789891b1fd349379ae9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef1f00c4-e22d-428a-b832-af1b5825c5c5.json and https://artists.proofprofile.net/proofs/artist/ef1f00c4-e22d-428a-b832-af1b5825c5c5.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 0x9351f76da4a969c40a8e35b1d53f25c369e76eecf36a0dd2dc128651a451f0de. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:57:22Z), 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/QZMEQ2068388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab6a9128a8118d0228328bc46926195d5314f06dcdc70c6aebb3f74e9128ca9. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:18Z), 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/QZMEQ2068393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf370c70c72dfc743525e99206048df344052621f8d4b790f411d929df0bccd7e. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZMEQ2068395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5a4fe6f4a8e17cc0cc0d7dc1630aac6f7f9537ab3db8c441ad8f86877869d9. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/QZFYY2118456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8e7f48afb634f16fe13887cdb2e70fdc5fd8536cab5fb4d2189e5f6703fc57. 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/QZTAX2237503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b5c8c22723e52aa51abca8ccb546c7e80d1e0ba40879fd67596febd5dfb897. 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/QZTAX2237508.
Dag Boek 3 : Stem Van Die Straat Mixtape
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcc3504edd44fe958e66e1605249f24581db22822d999d420bc8904805a8bc1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ZAMFP2300005.
Dag Boek 4 : Jammer Ek Gaan Change Mixtape
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7409f730b5ae6b86130abb6fca76502eef9679bbc3e59634d91bd08b054042. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFYY2316661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d37b8d4bd9dad3fded426d75db6efff30c0a716d558cb4792eb734a3bf9a0e. 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/ZAMFP2300017.
Straat Gospel 2 : Voed Die Strate Mixtape
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8347bebd004b0f1cbe9f37df565d625f933df519145b15f31c40dc227cac609c. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:02:42Z), 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/QZFZ72399373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760c625caf803646b9b0911ad78f66cdc4b727cc79863de4d85747ba944afdda. 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/ZAMFP2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3707d9143ccc2dde393874d0815f935e2ddb1eaa5e32be310357c354f489edb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ZAMFP2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe485497645f05c9a5c5c163d4657b3d60f9d1565086d1102ca6c38241b71a2c4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ZAMFP2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3802bf1de72efd5e239049b8a96949dde89efdf8bf5278f96d2582035cc21142. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ZAMFP2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cba57b78b1a590291d4ddae6112619ef4eb22052b412b071e98564e3303226. 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/QZFZ22456884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb448d47c83183f5bc2f9204d28708f5d24f86100841a84ba95fce0e0230b162c. 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/QZNWQ2420364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290c7bee82c23fa11177ac9b1a38191cdfe6798fb4360361fd3b5145cce185af. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN62569271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d284c4894edbc7a7cfa808845268f629c038b2f31e07b864121ee22b915a548. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAX2521738.