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 0x565fe185273e77ad9d160d8829b7911fb3268722ac0e9037ad96dcd3b9dff9e0. 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/dd81efe3-3a29-4998-a3a4-12a50bebf5c4.json and https://artists.proofprofile.net/proofs/artist/dd81efe3-3a29-4998-a3a4-12a50bebf5c4.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 0x9a4dcb1c243a1c12192226779d64f440c96f9859825c1c4b6e1352b78e2b7e68. 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/TCJPE1672094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0b8997eec5c91f4fa1acb5c25e698ddff00b66e5f8a891a4af4c606d3e1d36. 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/TCJPE1672110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985a43ba79c525ad5317b5924303a6c15d0df07c7b83e77e7564da3b4e0e4f82. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:23:55Z), 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/TCJPE1672115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ee1f9cd03fc3eda0684df6238935b23ed65c9ad7f97bb3a7e54c4ea4970469. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:30:24Z), 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/TCJPE1672123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a583f9d64d2669ff7ee617c042cf6da4e9fdac1f1add1b7429c6933805f14b3. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/TCJPF1713724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a308baf68a518a3b4b03251ac1806022bd5bb29cac5346b75a0548737cab08. 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/TCJPF1713725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9451710609748000f3dbc299bb5bc270bf125e9557934e6a312ae1c49e1cf964. 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/TCJPF1713726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39348177f84fcc5241ea5fa46005945c0f7079f63487af883c35a035c2c995f3. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCJPF1713730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d3cf815c7a4c5e201d96792eb34570e405f0f8a03f7204df1cd1d6c1cfeb0c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCJPF1713731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355abc39139de2fbb1177cdd1acaf6d81a3a6bc4156208feb46e1348c9155476. 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/TCJPH1869526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f6fe43f23849e2612b2dbe6c3d0f3620739f05356509f16d2761f299c3272c. 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/TCJPH1869530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d044f3a2926acb9b52fa2b73c9d1d7322fbf7af1af98d47ae205032cc48d59f. 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/JPB602053120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb7e4294b7702bd23007c8e232446adf27eca0ddb5f05d7bd7cd11f8e37d62c. 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/JPB602053121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a43f6367433ad8c8d46c6925eedf52d9977f41e28ed2861677e91c9ca85659. 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/JPB602053122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb246dc4bd78558464b6e7eca0b2fbe849fb12425d6af94fe3416c8cef64dfc5f. 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/JPB602053123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b1bebe061082c2afd26f39637cc0d8077c7f332755af96b2725dd9504941f4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:10:51Z), 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/JPB602053124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cb1aea532dc7ec72ffe06e9ba0d21924b02f0c78b5189465671474fee59ee6. 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/JPB602053125.