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 0xbad1752e996638dc88fbd1f3c585b6ea2380956c63f93c5d429b241c17d8fcec. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4732e194-187a-4d50-93e8-4450b91f2a8c.json and https://artists.proofprofile.net/proofs/artist/4732e194-187a-4d50-93e8-4450b91f2a8c.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 0x90d3f04ca2c24d0071512606822b939cfac60869159105f3c9a5344c61d9ba16. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCJPU2333981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a1528982e01ad6f5599a22a24611d6e8c5c32e6dac7e14413c8827e3346616. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCJPQ2290712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc223e8499c6468ffa367a87b20a79bca649c87c84c7569acc0e678a8e60b81. 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/TCJPU2333989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315217d90c593bf58d06b78c7a1dc176f7e3b81dd927e2f038c657b95b237a89. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCJPT2203942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3aa48245c574c9c260b487b2783c69b37dfed85814e4e75f2000c4374186c39. 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/TCJPU2333991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d7280b8e6e976c3926656ec0e3125d360e56a8a3192a33547cf0b580463df2. 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/TCJPU2333994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f97aeaa819ed3324b30abff9338157ff62148c8102c304ab3566d16bce11860. 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/TCJPT2201210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9969488f1d75b83f78ff04d09c76d868d1279508dff354c252f0365303d4a9d8. 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/TCJPS2226599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d4cf013066400be37a5595c853e55df5e18fa680087e7b0cecc491c6dd9ffc. 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/TCJPR2216589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a1528982e01ad6f5599a22a24611d6e8c5c32e6dac7e14413c8827e3346616. 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/TCJPQ2290712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ba69381176e4615e1828516cef2730a31326f51b36c8a88720817f20d7c0bc. 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/TCJPQ2142786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6b0146b425a5463a4d61d51c98d6d46906892b987d069c3c3e052c1260087a. 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/JPS801949610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723c341739dd0573b97a07797f24133584f6d06ed0cbcb0c7eafe8d74a74e6e5. 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/TCJPN2183124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0562cdc55606ab5224aba972adb844c881150ce1cc39dc4a72e6a8d79312c340. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPS801951038.