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 0x1dbd3955fd9f153f929c117b1fbe975f90e3176c2146b82614b04b06f560eef2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c90899df-7650-4232-b7a7-8bff9456eb4c.json and https://artists.proofprofile.net/proofs/artist/c90899df-7650-4232-b7a7-8bff9456eb4c.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 0x8d8ad5abe45200ead2e2165014d2b16cda335d9b01c90666b90f0d5ba3e8d88a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AUMEV2474818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f99aa4c489ff0c33f8705d37627afea207d02aaaa96f5663a23e22f6f899aeb. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/AUMEV2478086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510206885ba71219ff7ca79b6bd0d9b2dfd88e5a5d521f8bb145cb04778b8169. 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/AUMEV2478851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aeabaaa6b91972ab46ceb9f217cc58b06fca1f6d90fcfbeb4a6579214575d9e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/AUMEV2478075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf8f663351776e4e72cd1e1900a9616783e17f451ba317229bcab73b48ef8bd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:44:37Z), 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/AUMEV2478783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15dbb05bdce7d9876942280dd353e71f5b52329d560df84bb137026c142178f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/AUMEV2479274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9aac9ab4ec73c6369d70f36008115b86577b82bc1de2c4de654c6bdf1100b78. 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/AUMEV2480237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dea75f702efab5bc11299499a2a2aeb17f289632a6ae2396877c867af430ba9. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T13:01:06Z), 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/AUMEV2480391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6212e2718f0ca800f62999e38b83719d2beced533e7bdab972a1de8bb2388d90. 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/AUMEV2480508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1375a060d9f1dfcf193eb79e98e36fc9208838236391f11b09082b13b2a2fa. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/AUMEV2480628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419804c58949d6105c148dd0c224258beb5de0f1cfa9996492dc7a44053c5232. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUMEV2480607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4c75c74eb740b6b7cd1c3befec82c6b16474189f1ab9a0bdac82e4dbe64597. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/AUMEV2480672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573012119272265777f18eb90171e33ec9ab621ee2a541f79f2da24d710b030c. 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/AUMEV2481120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327f8d6c86c7ce9a34c6f8185b1ed6b30b6eaf12937fc4e4fd4999ec27762c60. 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/AUMEV2486238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab3c4ae02475a4e2303047df1703f1b37568f66cc019a54e89ddc00d83c8744. 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/QZNWV2432343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ef7a36da233e1bcfdfd51cb31c7bf79c2ee26bd6de878726413b9fe8d3b07b. 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/QZNWV2438455.
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