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 0x6cca87654ce6770a7fe569783f198eff9eca533376dc762ac84b9305360aeabc. 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/84a189b0-55fd-4af3-84a6-6431b126a9c1.json and https://artists.proofprofile.net/proofs/artist/84a189b0-55fd-4af3-84a6-6431b126a9c1.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 0x2f46a323163cef8a984da8bdf0037c436a5182b54780952f1cc0452646c3396c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA62346984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc96c1e67c10bdcda6de2780bc529d189886d3a3aa621f7dd04f2c92bf2238e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:25Z), 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/QZDA62346987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757fc718a2a360943e4ef6681ce0fcb5838b2ff7674a2bc58762c15120e79fb9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:12:27Z), 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/QZDA62346989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808aa70587948ef3c5b7daa4ab6d9567f46b16305aafcab84f8409cf43827e8c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA62346991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e665c8cc573616b10de8966d5e36963355256578325b5e17dd0ced7ae0d4060. 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/QZDA62346994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a67dc3bda32f21efe8344af5fb6f8151c94cf11e51173f542ed0183f8b3b0b. 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/QZDA62346995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fdb50449376d32252bf9e4b2254732ae20f273760033761ce64558cccf2669. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB92339913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee551591f679e444d86b91462e6dd6c87791d55741a97c487ebc9c732260e47. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB92339915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0a5e14cb9408b0591016309debfd78deb1268de7b648e91292fa7a1894b845. 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/QZTB92339917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f5c56c2cceeab7c6458949c81cb154b9c58addbb6c66cbdcd8cdd7411ecee2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB92339918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14f3fe7bc4d95e2cad06a8de582bc0dccdb3320e8e7f04ba79c45efdfe21876. 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/QZTB92339919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb36a98c8d2662b84d9142004c3445c4dce035c48265ac93b5d7343a83821181. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB92339921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a285a10e624e0fa389ea913627636ed78e2a90b2473bc26590ea35d2f64fa1. 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/QZTB92339922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5650e5b65881993891359eac4b2a078e3aef611924c1ad4a6898429b795537. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZHN52473735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ae50f412274bd38369ff93a70095d790caa4b96af0306f86b02fbb9217a068. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZHN52473736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3338dc2e01373be16ccef8a15ab62f1180a29f4ad06e15d475928c6c7e8f6d84. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZHN52473737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb54132b9278974869e877ce40bc1bc01814a2cf52bbce2c1f195160e6aed04. 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/QZHN52473738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b53b1b225897ba55829019f39118725fc44a912cb047803eb93877a9afe403. 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/QZHN52473741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5e1e8b55822a734ff5ec592571fa1269a0493f34678923d666a8fd7d1ae10c. 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/QZHNB2557598.