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 0x9e4fc45d4126cbcba6aa69c632293a249d586f6f07c9b44b83031cce6e76b6af. 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/b99b1110-8abd-43e4-ad83-6a272dabd08e.json and https://artists.proofprofile.net/proofs/artist/b99b1110-8abd-43e4-ad83-6a272dabd08e.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 0x5574e6f1ef24405e6f5d417f5b5132b54d0177349fafbcf4afd2620fbd83c99d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762433095.
Dubcatcher, Vol. 2 (Wicked My Yout) [Remixes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d7a5265d3f7f1912578b5aec2a8df889d67bc826da8df4bdef706da48ab283. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR2EI1600910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15b7c8b9e411b3b5a55ab1a5ef5f2c23bbbb8b58e0be3533eb45fb5809172e1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR10S2242652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2d3dbf01ccfdf39d6c6cb374c3c672608bad5d1da64887487e0e0ee7fec08c. 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/FR0U91501566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa368aeced58d5a2a3c312efe4e25f4afd2e9d1d61c684079c5bd0d1268a6e35a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR0U91501567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cf42dc30fc3b7bcc06503b9f8b01fbe64fa90f3c959786fe115c2e6964d0dd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR0U91501568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ab447f23f63ce9303d881a8ce4f30d105f5e69aef9dc7b82d3ae91e82c8e81. 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/FR0U91501569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ee362eaf95a2c029517e30f72bfb7de644c09b879ca3473c086726b2cefb57. 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/FR0U91501570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bebad8b79431ca85f1238a2adc9689a676a7d9c50a431158528fd3a0541c80c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR0U91501571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124889f4588fabf0434197fe4eb848b3627f0f85ecef50faeb21518a5e421610. 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/FR0U91501572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6ca7b62edd9bf5dc54270887381596578866a447beb2f1b8583cd196eeb58b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR0U91501573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa233f336af810ca0264102453cae3f9ca824c403519ddc67e9fdcd2c7877641c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR0U91501487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf765d0ef407d20fa6fe9dff95eed4eab3218e065eb786e22af12e133ea642535. 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/FR0U91501574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4a68b4bb7317059818674db54375355351901f8a2fcd364c4b72e557b5d863. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR0U91501575.