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 0x9037f46a70728f17e309d1c549a3f7c9c3d2b63db42ef81b3060984798714a53. 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/197307d4-f4b2-4646-bb54-4dfd91838daf.json and https://artists.proofprofile.net/proofs/artist/197307d4-f4b2-4646-bb54-4dfd91838daf.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 0x096af048cb94d875db38fdd6ec4c9177a9b232c1ddac5ffd70dbdff2691be085. 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/QZMEP2092381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038429a8473a71042bf3ac97cc65ac8aff68dedeba138d1b5289ee9881b914f8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:03Z), 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/QZMEQ2017458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270ca697dc4a728e8dce8cf89051b81311979db63de390f5b394c54d45dec31b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZMEQ2017462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b98185f1a02645f4eae9a2dd57366eae80aa8d59d26eaa4891e70c411415326. 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/QZMEQ2017464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e79c3f748920c581914fd956308842c4be34ac3565de8500ed1e7b9616f41ad. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZMEQ2017466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3a7d4d762fd9825a06a686b211a20ef0f7eb8852560d8490c82cc30dddf75f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEQ2041738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7bf50178bba94fe0d27679a6803c2e39959dfaa2d2d6917f092f3a0cd4b0cd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEQ2041741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921985f39d5fedc32874649c0c2634908157f3b6adf45a00079c7730205d0b68. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZMEQ2041743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63595efbdf151e698b73df7d675bf7f57ab288634c9754cc8b889fadad1cbdb. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:57:23Z), 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/QZFZ72195445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6eb2a77a36338a4e01fe06dd6d8284d50c02c296897ec4e3adb48aced61b34a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNWZ2181131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92a66c04a719afe8da4f2acf35e09f7719d8b71c202e6a6d918dbb6b58006ee. 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/QZNWZ2181133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3be2605e717c4bde5059fb3f7b6c6217bd1cd74427749798f3cabe3ea521c4e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:02Z), 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/QZHNA2327899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c25f82db009a28181f4abfed86decd5f211080fa2bad567430f2bebb31cc31e. 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/QZHNA2328383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314e565bfff35ed966d329fd1b2035431f84d2f63d5de5485f215b131c203f8d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZRP52306559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed67c7b163cb3b9cadb5868637a0f50c9470be2c1555bdeb5e7f54658ec4ab8f. 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/QZK6H2509219.