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 0xf2adde82f9ec7ed96ca974fe2ac256a15595d65756f0d3f54c7d978dd4c1c115. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e615c50-63b8-42a7-9da0-e00ec2df1892.json and https://artists.proofprofile.net/proofs/artist/4e615c50-63b8-42a7-9da0-e00ec2df1892.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 0x47671c6c9ddc4207cf3205760ac530accffb07f77783ce390f5b2ce868aff815. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR9Z62400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17495d09f481b4df147209b038c3458ce7212d66d73ebea1f9fb4a59d8be6602. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMANG2253977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae27b49aab795cb7e175580a2b924ee532fe740cf495015160e7e1ef5f7ae3f. 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/QMANG2231363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3188e37322a4da95374414aaaf0eaa9ff2ada1ccc9f2ea7f796e90c553b56395. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEQ022391285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381130cb478a4cd528db9137ed03cca406db72b102ddda25c96d6a78a946fd98. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH7812236654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4a79bbb47588613a6b159965724837226fa82823eff67bed1ccc719949dfc6. 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/QM3DF2143194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d2de80db12e7b51e0971754b27c63e59f5aab64f695dbf10c028f3518de62e. 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/QM3DF2143196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e826f377e6420c0605cd3b526676e8c09867ef8b3f5f7131db1946fd959f53. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM3DF2143201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5759677cfcd9c63a57514d66356a5d3bc9c044b801761f385cdeba04610764da. 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/QM3DF2143204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b4ae1cde49b52eaf74cae1f4abc750620f8dc7d360ef2af9ad8899cf607e14. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM3DF2143205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bd9c83cde8208fe1410047d74f31a4ec48dea77ac9dcea347608a9c6820369. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM3DF2143207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d47ce5a23a007566cd87cf8852b3b5fa6b75be14f9bc2945a7e30a67bd924c. 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/QM3DF2143209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08336e1123fd48429c7fef6c9e6213f883d1dcc75ff6f05daafe3ab995002fea. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM3DF2143211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc0eef4b75714d09f4cf78d2db38b7ffcd0e73d7f751f595bc33f23a75e4760. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM3DF2143216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7bbab95cf3712ef9dfe6438f71e2dd5d4e282b4e448f265832540013b48316. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM3DF2143206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34ecd93c2b1535f83d478fec26115bafe19e85a3366021bb02c31ebcf7529ec. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEQ022391283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b3d9c1c4a38aa99721737b2936659d48097c06a00b8945efae1b0bd41caeb0. 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/DEQ022391284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3188e37322a4da95374414aaaf0eaa9ff2ada1ccc9f2ea7f796e90c553b56395. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEQ022391285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bacdce163c4d13f71ea9ce94eb94777733741017a8f171f0284012bd53be6ab. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEQ022391291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b91f21e6204af1e01253540102965348ebadb009b2cd743b2374fe082a62872. 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/DEQ022391293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983bfa0d01d90b53ae18a08fa3a108ad44ad9dd2880ad0ec278a4a8b27ab4d9a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEQ022391294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf85f4b986b5747b3877f398e2f089406325e5670a9e0ffa997e4e1ac743bde. 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/DEQ022391295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68610257f5382cebd235335ffdffa2a22c45436b8fa4ed223b98ad21a4c12111. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMANG2231361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71486629e1ab0ed5a9945eaf78e6557e7cd24cf26a4067d1bc5908796468889. 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/FR9Z62400612.