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 0xdfeebe731d0aa08d035a8431c96793bb7cb03d215e0d651a1e6cc80ce7247f68. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6857d757-92c0-45d1-b6c8-687025fecde7.json and https://artists.proofprofile.net/proofs/artist/6857d757-92c0-45d1-b6c8-687025fecde7.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 0x2630cac14db978af8a308057127829dc60f332639a329c1d4738b36a2deff3ea. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ARQIW2505324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c8810ebe5ef4a596ec4e2feaea9309001ae6040bbfffac0cc27044bb25d8d6. 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/ARQIW2505336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1135487d64de49f299ebe0df3b7fea4615d7bca3ff9bbe856e06603eb4068dd1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ARQIW2505341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f634aa3671dec63254a6e8c08b9c4fa4ea8798dc550f7220986cfa1b37ad856. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ARQIW2505356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f701b3babb764acb1b7014f9bb2048752c3b204f43b68708313a694a717c9c6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ARQIW2505359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6538e8e8c3f910b5652276896639182b1acfb967cc519234e56ced1aa5943ea. 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/ARQIW2505340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9a2c68d70cd195c790da35dc9653299db89f9a664d717c41eede9b98abae02. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:48:39Z), 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/ARQIW2505358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2e3748a0ebce1fae42ff978c8fedfa6f6bcc1f596cee7160536f1dea962057. 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/ARQIW2505360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2b62f93054fbff2c4449d0a634093b2a1f946d2423acee88d1b990f7eb513f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ARQIW2505343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf6841a1e00a8c5e6d3968a15cfa9c4402fe64bf5aa17d22752d7351d6026f3. 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/ARQIW2505342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dacb19bd6563c26c677b3b5422f72b6006f4ab022f7dd4c1f880acd415d0baa. 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/ARQIW2505339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d8d6876d9580a5e877648430d6dea49a2ff6a2ee11024ddf6e09faeb5e3b60. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ARQIW2505364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19cf5c26a2f31a8ce9699daaa6cbf92237f895ac4f2c4aa9ca748843b55eaef. 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/ARQIW2505357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498b2401644bdf2505d48e83540fd3c2a0a4f5a9142731f363e886fd2663499e. 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/ARQIW2505355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306ab5a572db21a9c27230ef6cb28488e21c25484850e3b36ed49fe82c874adf. 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/ARQIW2505344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8289b163bf93f4fa6a508e7a38c9f6b960021bc436a6bef130d881ab1983564f. 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/ARQIW2505362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a80f5e51375b3bc5ec3df4638593b19e858d95311652c0dd673f5023818b34. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ARQIW2505363.