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 0x09a8a2993ac84d781a87203627fd70c4e34cc2f8d1d2230b1ddfdbed7f1ecf60. 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/0d3dbd9a-4c01-4924-bfe8-e56c4d84f785.json and https://artists.proofprofile.net/proofs/artist/0d3dbd9a-4c01-4924-bfe8-e56c4d84f785.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 0x62b8fc90bfeb19bfbda75e09f1d2493dd87ee801cf37dec3b2da4c110698835d. 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/TCAIQ2444036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e706afdb1d8af41e1236412cad1c009fcce357e693fe3f3c195da3f2adaedcd. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAIR2444038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b7c472c4017642a6dd56a2eed0569cb52e73872bf77c575ccdd51df8d7b00d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAIQ2444044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3ddffa4d428a35139fe36ed0eb6ee9b752641744b5f453d5fbdb0d4cb8124d. 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/TCAIR2444047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0c421eabf8f6631b93ec6fe3f27995bf47a43f8bee16f84d9304fe56f0ad8a. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAIQ2444057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaa50888354b4073b34a97a49957b5198a69b0ca1c74fbbea3607b4221f9536. 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/TCAIR2444060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2afb1dc56e19c15d626ff6583ae7df12eaaa2ae56aa9f6170cd48e4cd68ead. 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/TCAIQ2444061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e437aa011e47e8e72447ee1de5e3d00d18b0669b5361a2a029717860608f5b. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAIU2427568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dfb136c2887284d1adddb4af4666da0cb387b2a4a5ed38d2be43ba16da5b3b. 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/TCAIU2427571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acd3138ed7742448ae8746ab57d2e46262ecb0adb0cf98895a18a3f761ebe73. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAIV2427579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19683ed6619ee1b807566d097aff0d58928f3cddb467d6db171a39b2d4dbcba3. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:54:02Z), 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/TCAIU2427582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b854d9246fc4f33b67d4f07d30a8d49266d9e35d3dbc2a93e2b51983df9cc7. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:34:35Z), 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/TCAIV2427597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f70b55b193fe4bc36007a07cf34fb81a1633209c9b9369b62b2b2ed0b0c2ab6. 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/TCAIU2427602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe018c4a7dc1a0bf87a2d683376746c88afac7e0c9753b23a8018ecf38cdb448a. 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/TCAIU2427606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc853967b773595779b372a409453d7aa195ddf45ed208c0176e0a487fcf0c4a6. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAIW2407921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acc5ee24804fc762f470e64ce1ce9e0dc7234436f00f4d51897c55fd115a4ca. 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/TCAIW2407923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dd8d428d6c52cbd22738161594a9a9a1e0fa8e616a43452eff80d4f8ed9a7d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:27:40Z), 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/TCAIW2407925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe58de228a9809dc5c9ec658c2650643a9f7e2ff77fa68f9719cc6add644aac6. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:20:48Z), 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/TCAIW2407927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce83cb90965b2b0dff4320bcbce3740eb6370255f53448ea623d0ed9cd5db228. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:40:14Z), 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/TCAIW2407931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4330d22e8caddab4b9e9d6b6b4275414ef1b1d36da37770286f7475b18c6a1ad. 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/TCAIW2407935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89bce5545630ff8709c266d87588145b3f2fa4eb42296f99cfd3c579a6ac966. 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/TCAIW2407939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9b287dc1fa303442f7b4d1a1e2037efbbc853f7b5b1a887cce4d603351c04e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJA2404684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf992f819607012c018b1c5803ac7dc95879f4c0f0abec375d6b50a220824461f. 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/TCAJA2404688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf66f939b7e490c7abde627a8c2c414077ba488af8d2757ef8e7cb22c977acb. 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/TCAJB2404701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0776bfe2d8ea8b3f2c1bcdd990c7ac2c3ade2730d51971e2f8d7a0b69945b6. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/TCAJA2404712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbd34c0eecd6e12b5752761b29ba5d5cd09ae8a82e67c78dc038974aedcd380. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:17:24Z), 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/TCAJA2404726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8fba05f5bdcd9d1b7eb274d7f577fdfbd064270c3e052cafefb5d866e4313d. 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/TCAJA2404731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd18280e1b50d8e310a4fd7eb695748ffd5d971372abeeaff34bb567b95d385. 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/TCAJA2404737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec6a6619d4ff89f8dd620401a8d497709e39ffb5ad57c7d73a4448a83414591. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:43:00Z), 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/TCAJA2404745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011c5a3939e25851bfc896668213ba7345886559e92732254e548da984bc5f13. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAJJ2517783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d6b9d75e5606d280f233bfbb3fc466a7b9f6e1a07bd5cbec10fd7f4f6698bd. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJJ2531313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421afdead92ec36e042894ebea00f45c0022f96b58c40f7dc9e299e074e79eb0. 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/TCAJJ2531317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1ad571f365f76131b2be45dbe4f8316cc7057a8e0df677954de29d42527fa3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJJ2531318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a09121a325214a8ca8922f4dc9bec464c259fadc55f25ade1e4781cf3a6736. 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/TCAJJ2531321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc286d7fe0e7140df32eb40cebdfae4fda9a8c214d3116479fd684b6255727f. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/TCAJJ2531325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ec407799909cb74b681891bf143ccc87e8c05dc451a2e46fafabb206eb255b. 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/TCAJJ2531326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74874d1524b361c664726330c8c5d45299b4356bce629ff3d309c0f0f050b216. 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/TCAJK2531330.