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 0x780f1fea3f29a04116f41b4a17322b929739e35bed4f5c131eb70209ae73bdc7. 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/b3912fd8-0001-4ef1-b818-25353acd0e1b.json and https://artists.proofprofile.net/proofs/artist/b3912fd8-0001-4ef1-b818-25353acd0e1b.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 0xdfe2259491277b38a94fb9b80c3eb0cfb8bb1cf94a33b5b7d8685f04be37e10c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US3DF1400957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f9caaeed5913135b19ac7c2771d94c7859a27a6dc5e19899257810d0a67ff7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF1400958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9534434a19436780519bcff01bc3c5dece5ea06cdcd994450a8e5ad95e27eb2d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:19Z), 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/US3DF1400961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe2259491277b38a94fb9b80c3eb0cfb8bb1cf94a33b5b7d8685f04be37e10c. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/US3DF1400957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f9caaeed5913135b19ac7c2771d94c7859a27a6dc5e19899257810d0a67ff7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US3DF1400958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93300e8d969a4583728a8961ee1684701396a76a9ceee75a575340c355a3879c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/US3DF1400964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd708d50b761c4dfffa1258df18388bd0b70feefc8a5db8cc335fe4f6c436f61. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF1400969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa452115a1ec6de972a465d0296520457d94d992d925cd359ffdf13340be62ff7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US3DF1400970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc30bb5879a61190f834d80017836b0a0f443cadc80b4af00412ad127774c0c1. 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/US3DF1400971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb199c19a5e81c0eb2e3eac550b88ecb43cfafbfd249d291249bd42393fcd404. 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/MX2972001794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1f7829f747ae069b03072778d7da986be424491db3ce742dd73d14b202dbdc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MX2972001801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd708d50b761c4dfffa1258df18388bd0b70feefc8a5db8cc335fe4f6c436f61. 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/US3DF1400969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa452115a1ec6de972a465d0296520457d94d992d925cd359ffdf13340be62ff7. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/US3DF1400970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53758a5c0e05473f7c80a88dd12498af824b7e3a5440867d04431cc5c8a1623e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USPWN1300457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c567871683147394dbc1f1e3dba82d8464c4d04e78304b5208bd264fe9c054. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USPWN1300458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d015161b424672b0b52d351591ea225210fe028593e67ca2df07fcff5c39db. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:14:06Z), 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/USPWN1300463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4f05aaa400ebedfedbcf241e8082e23bfb4e3278c349d90603283a35e2f5bc. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/USPWN1300476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f31dad291e5c47c17da6716aa7f430ce1a59a83e1ffc70bae9753e078aa3a76. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/USPWN1300478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064e22ed9de62d0f0c6cc43d713795034eb7ad101db3eacab00b1fc03760af1e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USPWN1300483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae8bdde06c2f8ff05c9b080e05254ccf166c833c1fc3477f4b911003231bbd7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USPWN1300488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f79cc660f04c90c02b6c4fe84116cc0358fb4d1ab7e75b2c59bc83cd627c1d9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:50:34Z), 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/USPWN1300497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb5704a6f9213c123095e61914a07ffd23d45243e95d07de0579851a032fac2. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USPWN1300498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23f0c9c9249037fbe8a3ff0ac06c809c647406c17750b978890106e6398adb3. 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/USPWN1300499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0589acafdb92d8b5c90f0e8f95e117404ef19c56d52e78c954749a0bd14ed4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USPWN1300565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a30116916a810db88aae3433c08da9a953ff2cd52648919c85d451cc958a76c. 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/USASN1300883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca85d3ae3b00605d79274dea41134f84557ffb9e4f6267b91afd9a90288e74c8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJV2149144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68aba7b8cecbad0bdaec180dccc9a22842bbb66130b6d7c9d3affd976074595. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZ5AB2225936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a44a201624ad2abe77bc0e25e93a2daeaef46763570e9b54a48be80c325c89. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:57Z), 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/QZ5AB2225937.