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 0xdc00cabdf1466727cf2d1340e80af5dac641c2a81d62342aabef29eecef088e8. 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/bbe8f273-648c-4191-a555-cf71bcef1674.json and https://artists.proofprofile.net/proofs/artist/bbe8f273-648c-4191-a555-cf71bcef1674.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 0xd4d6acd98e0d08fca96acdafc4f9033280fa2f5cdc7ae5a224327e5871e2ed3a. 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/USCGH2204438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c51e5070cc2234f834fa4e550e2c9c5e8cb4f89d53ea9e9b0880e43792aae20. 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/VED049700155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a08f3436eda87250ea185a444eac4fec5fb7720182d03fbf8ac34ff752b8a22. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/VED049700152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe903bfacd4467b1836ebb91fa0301c557f2e87f76cb8de22fc84e3a9c4626142. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/VED049700154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8824af7b28c6885e2aecaadbe6f2e148754c102bf3aeb8f077d942ae056ce7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/VED040000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed95929c83b28106261c4d7fdefa425f6277c62aafccf8e903d4d0d803f7a60f. 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/VED040000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451003727fa6cc91f33d03ecfc81432b1971258a4345a2357c736c50e11c49dd. 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/VED049700158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a5a24589caeb1a730c90ef8afb54ecb8d989dd09508c641ee3258bf8d33107. 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/VED040000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e750d40715c536ba9e48d2dfd121daacfc052096940208b1676a0ae0f7c0a48. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUMEV2334147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed9ef4f4e058ee99eac7dd6988dd76315a9469e1f7ec780c2ed8970d3907234. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAFW2104057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d29c24f83be10ef3cf80e020ecb7c8b65c0b74361920b4fc1f9c3635db8d844. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAFW2104091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd337634ad51a8d0517ded8963c41092007fdc063e7e4aecc0a453fa271b26068. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/TCAFW2104222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad4c7080d9520da8267013384253ed1987433da853c05d03d24e843b7cdf085. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAFW2104693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457970762f6fb655cc31283fb7df7e0f05069e0fc199699276d9685b18608e2a. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAFW2105350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436daede55f576470bf5771de9d8649719d81ae85434b9dfc59978d4c6bb5630. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:05:29Z), 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/TCAFW2105360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac79d20cfaf0d2f37f94c52ba1e9dcd96867eaa0fdb253952e9914a8fcbf473. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USHM22436526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb7a66aba3cd7cce79069f4d007045cc488549225aa640e6219b5d0bb4ef46e. 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/USY242404861.