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 0xd6efb18d83c30eea304355abbfab076008d4601f4bfb0d66c05594d8059252ed. 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/c63e9d48-efc8-4250-a459-57900aeffe2d.json and https://artists.proofprofile.net/proofs/artist/c63e9d48-efc8-4250-a459-57900aeffe2d.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 0x52da0060427d16bf516b447330578364dda304a13ceae0b4e24f1de2b0076798. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:56:38Z), 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/AR8691900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf618f12a65fea7b588a4d3caa60f8ba733d3ee2edb2bd423e7911e31c6969e1a. 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/AR8691900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16bee24537d8d4802e36668f6fbb6de70b5db088327a77550275bd7e283ae69. 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/AR8691900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0582b19a78ef96e58650671edf545cfc42038a77d05439e7ade5acc38bfbc9e. 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/AR8691900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1955be3067eb1c7385b07d38f97ef1ffc4ef5950c9cf722395db491ecd7403d. 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/AR8691900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74323dcd83a2ded273a07f8f16b0401f8cbd2c97c512a42314739e0965073cf5. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:09:52Z), 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/AR8691900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76467e5c60ea5f7e969b4bd52eea081c0a7e36eefe3ca75edb94464edbc18d45. 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/AR8691900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2736d2e50cf4f576f7c9f103915001aab507ee5b68962f94aec94d197d94a7e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/AR8692100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cad1593fe8f9ed9930d91ff86336d6875ea95e43c66272fa866dab8ce612fb2. 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/AR8692100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c0c259208b8b760c346a0d4df133a8c29e472729f76aa1ed9c07bc9902a2e9. 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/AR8692200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb834090225fcf8f4f3b4493f1add4b7fa4c5f2a6d472085eced20cb8ae966a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:00Z), 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/AR8692300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a75dd154fd0980ffd0b75ab0cb023feea7d77b82d78f38804cc6109f31fff7. 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/AR8692300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8846f177f90dbdee5db4273dcf48bbebf7059048bf8f571c7548596b68b4fa. 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/AR8692300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fb0b144203a3e22b80b5d3368484e42fc8e688d09b0dc10c983a4a68dab4f6. 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/AR8692400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c4f994c7c4b87ef57506c11252e12932ef1c3c74188b140b8edc0f309aa1bd. 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/AR8692400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0031b60ebf5b4836d8d7f8c6ccd14d3eb0929b8b98b292cfa0d117f232580422. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:20Z), 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/AR8692400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396829ebefdd3bb99ecb2df8fcb9b9eacbb8d441447126a353d44066e2623f36. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AR8692400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8917ece66866595dfdac5254661a9212efce7bb07dd57d8522b6b8fd8193b917. 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/AR8692400031.