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 0x410199abc904a1dca83b85510a082e02b19b90ebe58711241ebadf135f49e3e3. 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/6bf46134-7463-4255-9710-2cea65071f42.json and https://artists.proofprofile.net/proofs/artist/6bf46134-7463-4255-9710-2cea65071f42.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 0x515ccc3ab036d5b4b3bcf68d78e1c709c86804849c3a292fd220133594efcf3d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZAQ652400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfd57aeb08d8c2e494faa72f40180d72150c79708f4ad3ca7c35654a8e9a46c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAQ652400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ac2552e97eda3dc37771da34c64cc3e33b93e5deea50f539e67addbfe06491. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ZAQ652400266.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3452e6a1d147cd9ee6912fe20da593b5b51303688e609935daf8cc29c0811bf. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ZAQ652400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4daed9c40d094b6d7f8408a95bdf1d2d5d6131c527710419095653cfe0112f9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ZAQ652400275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8366c66906d4b9967e6aa3be583277b16656405796a8e7df8e78495899c7c549. 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/ZA56E2419657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189aa26d62320aa1bbda0bb2369dd4607ad2e5fc7fc36539dce66c5d8021f110. 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/ZBCKG2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfad110de04941b766eb66355c558f1c978f819aa189dcb7a9bc49b1d2d5690. 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/ZBCKG2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7356724690b8866e6e840f8b8a2a2ddfd63908a87c5188786c8202b154602ab4. 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/ZA4PM2100309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189aa26d62320aa1bbda0bb2369dd4607ad2e5fc7fc36539dce66c5d8021f110. 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/ZBCKG2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee554c0cf079e7cdae0461642fdf9a0033cc1b63f581766c5dd9ce10bbefc30. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZAUM72201660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ae2684a27132b20349fe9c340f3ba4161c7b8288bba78ad37066ffb45300ed. 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/ZAUM72300847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8625be4a4cad57629bf7d59e72bfe9f63acc2617f386f531223dbe5bf2c79125. 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/ZAQ652300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98214828aea7ddf3acbcaabadaaabdaedcd23917c58a49a01ab19531596c7dd8. 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/ZAQ652300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a708be88c468b4f78b123fe7aa5de82ee6fd2f707d6a577b15dc82ecc2e37cd. 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/ZAQ652300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649d5fb3eb33b589c5535f06a3bb187d197306a1b008f9d34f961952e556d641. 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/ZAQ652300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3100bd708cc69adccf966958b4d6e1c0c9028505b0ff6e64bc467396e33faf07. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/ZAQ652300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9034c01b5d25f6a471d3c1ed1168470b0efc64185e3233aebdca0d4ffa7776ac. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ZAQ652302499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0eadc4eb727542240537dc899a4ba150822d61542b90349e613e5375548720. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ZAQ652300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd7ead855cb98281842335d06b5dcc3e063a8b6b69ac4ddc9b06b0d0f13f7b0. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ZAQ652300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eae1b855b134860e5aa3585af874f03724608f2f4e7015ed81adfbb4f47a9e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ZAQ652300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a1c6ba4092ca5d7c40fca1f56a610d36ed114c80eb63025f7c156518ec0dd5. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ZAQ652300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251f788c54a2692332404ddd2da4338591f71dbe7a482a68d6690e057c41e8ed. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ZAQ652300158.