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 0x9c75880c404145f4a4ef94b4065e0abe00c3dca7a46dc2484abcb23bc7ecd4b9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19835bed-2bff-4732-b3b7-9d02680b2a0c.json and https://artists.proofprofile.net/proofs/artist/19835bed-2bff-4732-b3b7-9d02680b2a0c.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 0x1a83b73c52ee69ad2e557f2a6c9273846f524e05d6d0236ff63e550dbcfb2746. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN81919217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31507aebc9e66ab44c6e6bf109e65e03cae0383d8d00a5fcc8d7de843b308107. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:01:12Z), 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/QZHN91977142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea02f9db2292bacae8e8e7ac795eff8be3cda727bd377c40b667d525dd9f977. 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/QZHNB1934428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00da65694fc0beb586bd111ad81faea88a7ed7c58a848099370cc6de56b02444. 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/QZHNB1934429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06958f5f589fc9fb743650542afa7d33e0e32463be0153b3e8eb3ad507dfb9e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHNB1934430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73593c0f1c1205751b16d77c18493d40aa802abcb029e6a9075f3df04811b301. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFYY2058788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd6fff9131f9f9c2832a144355eb1b1eb3ac9fb9797b2e421524faf83ba2531. 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/USANG2012463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b75a461b22b9edc98d85713159ccd85bc033a432cded81cdc5e0c03e9c0845. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:00:20Z), 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/QZFZ22064136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e3ae463429e3b7d7d025fc720033ea04677f88b5811868c0bc69bcd75b4f8d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFA2028853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156587b9301028ac025831b6c13ceaa087feb27491252b0b4524e71053ba756a. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QM24S2100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bfcd2abdd73dfcbab9ba8742d29651f7f9ae83b4a1823e3cc339af48a1435a. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/GBKQU2132569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a80b67346e89f1a47f88f6a57c9246057336f0752b099dc3909b8c4a291d22. 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/QZN882135103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1166b658259a5c892d58ff0f62ccbd0a5a57c8bb753c8b8ec0a35aebf70f636. 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/QZN882160180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bd12442e23edb3e4395550c828b78e5aff30c79ae6cf8a73d26651eb0f91f8. 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/GBKQU2264067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662209eba28237925e8a05ab220af43ffdcab7e1ecd78aeda7c15d3216dda559. 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/GBKQU2264068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9af083241f0ee4d0e9feb38294e432c2e2708a97c6521a058c43f99196b8c8. 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/GBKQU2264069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9cb5b8094eb0f86c5c089497cbff27964b4a96bf332b0c30c312fac128b5d8. 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/GBKQU2264070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba665dcdbedfd5d8bead392c0ed49acd7051e24a35db0c156755bc21addf4770. 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/GBKQU2264071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c73de5965212aa6a3e2ea43a2d5ca4e9288b0195f2e02531332e647f00e6cb. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:01:14Z), 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/UKZGC2300999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda0df953713e5264e408f32587fd48cdd4ecc1e517f65fc19d68ffecd0646d5. 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/QMANG2205107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79850cd7c66876d382ef0e44ae225ef79e3b6331fd3a7e0ff058cf1c54a930cc. 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/FRX202485371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1166b658259a5c892d58ff0f62ccbd0a5a57c8bb753c8b8ec0a35aebf70f636. 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/QZN882160180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a80b67346e89f1a47f88f6a57c9246057336f0752b099dc3909b8c4a291d22. 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/QZN882135103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fea45eae67a8b844f52130f27e395f1eca3c3a5349f0110c856c649caead1d. 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/TCAEZ2059167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86136678b3868a03720fd0e0b17c5c2198a96a9dd035137c518323eb22a2fc82. 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/FRX202466991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164641b38fec014d2ed8c8e9111f02021103d15e3c74bb2840037b0ea99a720f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU2224999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0071031677ca9f64d60cd2e062a2a1e70dec5100c42e1b0817e3a520f7baaa3. 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/GBKQU2225000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaf5e308f4bda16b586032d8410296c4eedf0337549d40526f3efb1594ddd01. 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/FRX762487334.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch