AVANT, also known as AVANT street art guerrilla collective, was the artist group active in New York City from 1980 to 1984. By 1984 AVANT had produced thousands of acrylic on paper paintings and plast
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 0x459a425d0defe96b48ffd1fc6b8a5affe74ddbcd697db29f982bd7d1f05de266. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24c91f08-ea5f-4748-8ee9-574d3d99df48.json and https://artists.proofprofile.net/proofs/artist/24c91f08-ea5f-4748-8ee9-574d3d99df48.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 0x874e047eea9effce1d329f82c017a3f9ad57951cbdc7e7c5321329ef0e7e7f49. 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/FIHAY2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa602252ac467ab7e622c64f90f86d9e70aa0427a54c0c62729328ccf516ed23. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FIHAY2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc3c50c6e4849932032f6811fd01f89ff953d50e2d29bb463a85de42a994e23. 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/FIHAY2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821c5fef6397adcea022c93c8467475a64aef63abd8d65b44d83276b938d1543. 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/FIHAY2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dec70da0eb1e5674734c68eaa1d9740bb6fd4675ab19719e26f843f6e5f3499. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:50:47Z), 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/FIHAY2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d26664179f5c008d6e9d6d9fe0fedd0bc29fb9f9cedf762f45e19beb04b787. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:41:04Z), 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/FIHAY2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0995253438616c83d9e414235c95f3596a6173d064d7483d6d1a248746987df. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:18:19Z), 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/FIHAY2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8092383641f16a209698e22c24c653151ad7ef8fc4e92a788fcfaa9c24b47e17. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/FIHAY2500002.