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 0xc8e7122c47d40fe78f1918f03640642fe796066b3caf04ea24fc06fa7e1b7954. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93d59911-a182-47cd-a541-e64c5603716b.json and https://artists.proofprofile.net/proofs/artist/93d59911-a182-47cd-a541-e64c5603716b.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 0x97b61b9f9fd986be2472bb4992ffc2a30da022cf32b8111929222a3415344851. 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/QZHZ41944524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa2ec443cd2c08e136cd760fba216af8bdd017f4ea2c847631cc735e5323ec6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:29:32Z), 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/QZHZ41944525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a0a51ac3dc4d9a8f367ac87c58b32cb7cf2c3d7ed36159281fb73dc36d4218. 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/QZHZ41944526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac016932243f41ead22944decdd9b54d3c1853c51d909655c7c15a9a42c527b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:39Z), 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/QZHZ41944527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efd24e0283b0e5cf92061e96602ec1acb3d940ee4a4a7e344d583185bde0901. 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/QZHZ41944528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479b75200e4a77934607399a211994ac421eb526fdc335370ebf0a95316bbea1. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZHZ41944529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832aaf8156a9a1a921084000a4dbf803c6c815e6df6ba9d9ab41806cb6612fce. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHZ41944530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa827f364bcc2882200db4755be8efeab6782908b60f12a1093ee2dd05b1e271c. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:49Z), 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/QZHZ41944531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc86f9c3214d63de232f7ef99a508c1fb31164658bcb63dc6b7d96c7e2b8b08f. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZHZ41944533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275b063bf96f40870915a4f0fb290dc79351ba470d90c8e9cbf2776dac08ddca. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZHZ41944534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818a45986b62863b2261f3585d5290866a12485df8a85d1081cb8f55bd4628aa. 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/QZHZ41944536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ef0cf49911b89121f84c05f0fa96b4681e291f9bb6e6b8264f14e1cb9e2fe3. 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/QZHZ41944537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4cc8b99586456f5dbc5289d693bef6e9ee4b0e9d771a333f5e272b9c6cf169. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:51Z), 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/QZHZ41944538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f2f83b8feda0adc04b4f5d9d5a7cc40de386c51173bde07a617d3aae0da783. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHZ41944539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd3909c9e20f1aa30e45aca50a4f58eee511526b346a2ca1249c2416c07dcc4. 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/QZHZ41944540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222bac512da74a8df1070d8194e37b2434d2316ec9d6685fa798093fc6e75f8e. 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/QZHZ41944541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa323f005107ae08beed99cc7a070d2a1075ddffbe05135ef20a9f9ff8db9aba3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHZ41944542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa59e47a59fc438d20430479a63cadef93904a4a97b04d4cb67c3777331169f. 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/QZHZ41944543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb8047679621e16c4f44640c7bb74fbc4df775a8bd2c29c2ebe6db157ccb384. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:05Z), 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/QZHZ41944545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa37cbb1eaf9c3ef075197fe8f73c0179204da9af41f3d291a4d30b6c27b195. 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/QZHZ41944547.