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 0x86cfae0e86995bb73b6fdcea50d1d29563000feb494c44acd2d8bcc56aa65d0c. 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/1c5389ab-48b1-4d76-8449-e61fbbaac9f1.json and https://artists.proofprofile.net/proofs/artist/1c5389ab-48b1-4d76-8449-e61fbbaac9f1.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 0x80238266486059738c290372c0b26ef3e134f6ea0a17b604048b669f89a7b4f7. 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/QZTAS2591356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ae7f3b5613d06cbfad9d6c65578888b28f1c6d979eb49ec310a68b9059b648. 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/QZTAS2591354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f6a55b9c8b584dc17bf3ecf56566ac91c9bf6b43dd5a2995734bbf50951436. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAS2591345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd754a446facf4333e474129d357d23006cba079e85acc5a55cba4b71342e2b06. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:02:33Z), 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/QZTAS2591315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e16548595e5220e5a262432882181a579e251096d38416ef8f892dac4394fd. 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/QZTAS2591355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafb25486fb37fb17f6101ae8a85a74cb5ff3ad988eda65466e4fd6858906a7d. 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/QZTAT2547721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d86c622ca8d97e489ee71dbf653446a8e3bb94066fe8c852db15d6f97aaf7ea. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAT2598610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebd6c51db3ec5ee124750c3fd6ae34d248f2bbb184ab740ded9efef52b20c64. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZTAT2549530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1b73c88f0416eb787fb48eb00c0bea8766d86e091bbed8dc840db7de70be84. 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/QZTAT2592796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fa3bf96425ca26058973443dd8759c1d12051a1a2fe51524448340ede17c64. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTAT2590263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674ffdd8a3232d4f91372e7554ffb0aec54cd4c4bc67dc6a45dda888370a274f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAU2590265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0896c6068dc4b94c13d39523032f5d9f7f5ff67a98639d458ddae858023331. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAU2590253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee65bad40e691bdce83ddcdd8f2e83e6267951505e19574c3bd3334226001de. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAU2590257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d62c7673d85e8796510fdef1b76e2714fde87306e88666d40aa9393ef227c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAU2586418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb9a402072901e60f8e1157d611a069fe1d3e17f4fc4edefe249da0c5566d26. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZTAU2590266.