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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049451c0b55a0c01d51437694095c27eb1a9de2878e4a443df9a514148b8dcc0. 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/267665a0-a3fd-49e3-b83d-bbe8cb3e6a57.json and https://artists.proofprofile.net/proofs/artist/267665a0-a3fd-49e3-b83d-bbe8cb3e6a57.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c932b92a8eeddd86b540f0fa98d2e5c25fc7eb822f272207adaae1e0be5389f. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCAFL2130689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c681da42e693ebd134b47b5359f13cba1aa2d92887fac1bf86f04119d0e253. 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/QZHN42222978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9e96c3880d7c4b1623bf42f0667b7b906e49bcb14da1e5b571ede6467bb374. 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/QZHN52247000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955e6308f8c8640f53f53ba6d1ad0992b4677c6b04445b85592282bc69e9d2cc. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZHN52280771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe34705fdc51206cc1b6076f6e0b49ad3ee26095b68cb4296cf02c59556508ef. 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/QZTAU2276039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f24cf7a5c4f9f2b1d6f0d53b5d7175cc75c5003ba5ae216d070a1513ad603f0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHN52361198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc638eaf1afc5c90a301242c4abd505bfda15b0c4b50c6c30a3fe313165394d. 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/QZHN52361199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e157853f5bd4b728954ebbd6b90d690c53cde7b9bc595dae994d242ee9dd1bd. 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/QZTBC2352223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5adab9bc508ff3f0da78af99751b9290f07072645004c87e3e83cbee4c3adc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHNA2435697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fb0447cdf524f112eacc51e79971fda732677bfcb2f0dcf434a917b53b9692. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:49Z), 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/QZWFQ2561259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6ccb187e16e848c06003ef1e196d532347e6c7ce2a850ef27823f881fabbce. 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/QZWFQ2561260.
Abstraction (Big Band Version) - Vocals Only
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27e71f68ab99dbb7f06796943dffc40fd4a3b087c0292acc322aba54d0529f4. 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/QZZ7M2538015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaa9cf74e636fa11ae6ab00572067af67a87e5afe76546af67a36ebfde0145f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTB72495157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca7314946471956ee218434126aadb81f0b2c46c89043bdc5b31182e0ae9636. 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/QZTB72495158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751cd80eb9806ca485656668cc48995f403b31d2be4e9926b4829e776fe7ba7e. 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/QZTB72495159.