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 0x463242baee25a69751f8df0aa8190b403696e8e67905abec8576920c16c97d1e. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/968cf9b4-8cab-485e-bccd-fbd7f481b202.json and https://artists.proofprofile.net/proofs/artist/968cf9b4-8cab-485e-bccd-fbd7f481b202.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 0xde1091abb9407ab9d4a749d9c9b34b47d23c947bc63f7f2db86c9aba2fde6d0a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USL4R2346498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e2ee04afe51a33bb46fcff914130f459f10096f6378182f1ac66d31b4f828c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USL4R2346499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c8f7ad23f827fe075ff294d817f3329aac5bc418cf4301547f4188418c9701. 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/USL4R2346500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef0f16f79c2ac686d5bcdab903c0b383d447eb8a16181c6e0cb799f18599de8. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USL4R2346501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33974b077175dc9831f3648ee41f8907e517dd4d9c71da4cdac7fb0898d95ab1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USL4R2346502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0160e7163f1942bf2678ce91135adb37bb64c93a09b141d01f7fdecbfcf2e81c. 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/USL4R2346503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca92a1dcf58e61d0fda358b71684e9e6b8c6db449ecf3bd4ec2286055515125. 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/USL4R2346504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b90230b885b35b9fb3e493798303dda8cc4dbf4c4d52b393734188463d7d68. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USL4R2346505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1e64a0b2f5c6930d9e37a24ea0600d6c2e4ebb25bcc71d0810abfa4bbf1c04. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USL4R2346506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68ab1f34db663353c93863c2e8b370a496c79f2862eab97b78f93641d0c81a2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:39:09Z), 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/QZNJY2532617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d6838f98c2b4875839f6cbef807edcbd8ccaa9555d549217f3fed6545b68e4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:19:48Z), 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/QZNJY2532618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af65bfc0c4395dfe618fb9268038aa2441608abf282f53a3ff81cf78ee83fc1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:28:00Z), 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/QZNJY2532619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf719d71cff77c0e47986de726c2778b677179fd37a1b3fb938830b0ac9d59bf5. 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/QZNJY2532620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c66dafc66de0bfe32a836d6d4415774dd6c71adcdc356f52c323356576f69a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJY2532622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce234ca4ba85a3c724f6e01f8bf52c93dfd8983594ca895330bf40f0675ce8c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNJY2532623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f86d7359e5770f6bc0ca126d66b8d3db360c0580605694ffbf42384a77e7a5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTVM2543612.