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 0xe0259e2c2cd16ad949782e6a28a499eba06af107d04879c96269e5353626a66d. 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/d9db02c3-45de-44bd-9b04-f4ac3d04417d.json and https://artists.proofprofile.net/proofs/artist/d9db02c3-45de-44bd-9b04-f4ac3d04417d.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 0x50dc292ad270ca32f246c418f8899a5777108b4995ba9a110b2f17476d39e6c8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UKKVK2310328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a574ad0b5b4d31bd206313c50ec88c6d27d1694e12633982417ca5865214d8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:02:06Z), 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/UKKVK2310012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79620c760284a043b84f79ee8669dee067b69fa2ab92416e3f69003e1f24282. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/UKKVK2310324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564f5e021d0719f50be608c1e916ce1fca89b21f7f94bfa92af63800b9e3033c. 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/UKKVK2310360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9919b3a8b98770b7ca7b7287e7a4b532732f9f9c5ced034ad3e4ecd49211b2f4. 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/UKKVK2310333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fab4746b7471efb5f3b327813aaa0625d082b7f7f946644aa87a6ebc3439f3. 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/UKKVK2310344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4907c9d5f5fc5f8557cf5ed08fd9f87ee9c38cf3964329acd2e71e308a213e16. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/UKKVK2310227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdac34e9162e765801e32898019ce75e43fe9c39f217f8582d9282c046cd6f8. 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/UKKVK2310225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3885734bdf267830b15fb5c75c63c12f30dc2e7d5915788241dc940a3bb66e. 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/UKKVK2310318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033ad920c3cf574286400e268dfa34c736514fcdbdcfc8f44add143c74dc9607. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:06:26Z), 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/UKKVK2310301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d820f6e966812f597a7a80d664ad1400a86a74c557b7cd5fbad266b7a54898. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:09:09Z), 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/UKKVK2310150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f559e8d3d791e7db4cee1f498173dcd3c3465772300e2025561a032c9e18f30. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:57:06Z), 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/UKKVK2310186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e31a76bd0cb95c8b072c03b3418a0f6beaa7ba2c3ed9a50c8dda315bc1a8734. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/UKKVK2310121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5787bdec68d6eb2a619019f12991e544e608283e2e651288a1ff9d16f33c5d. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/UKKVK2310365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdd1b241b93cf02f2253ee9924dac6bf979be9857a2f72c1269ef8deba76aad. 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/UKKVK2310348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d0a89fc2e9f5765444cc4722fbba1f28e9f3ddf4de2b7ff6179a34bf76dcec. 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/UKKVK2310033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa9da9dc2970e84c84d20fe502c126cb0e0c5dba9a48225a6f0ceef59ac3844. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:05:00Z), 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/UKKVK2310015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291cfcc491f1a3b0b7ab9d8d6cd32faf9810afa8013529d12264d15104f8f577. 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/UKKVK2310003.
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