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 0x2b47572a35ccc6c7ada6124071d69b1df1f8db2a76f43059318dacc2ff90478b. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80508161-2c78-4fd9-8964-77c6ce070075.json and https://artists.proofprofile.net/proofs/artist/80508161-2c78-4fd9-8964-77c6ce070075.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 0x92b25904b3690ef48d2df3086fd6e7da3b15923a0cfe01395de3b2d2e0757048. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:34:25Z), 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/QZRP42148405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d68f8e65854275e73abcd33560725dcfe9dcaef87d0c6026a98566ebe9cf43. 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/QZFYY2495989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cbb764b91b4b60100ed66922c35d3ec5605cf5525d20c2a5c572bd7840bafb. 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/QZFYY2495991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf1b48130f6d15495c489a0fce99066c4ad55f0f9caa1744bf3f9b2f1f74d1e. 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/QZFYY2495993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29d89b205e0e6e0229c5700c8f9638572ec6cce54108b3cc709b453e86e03af. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFYY2495995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd43dfa21145d4b21b7ca6975644b4393c47a8651a5cdf362db5ee7b5583289. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFYY2495996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf727135b128c9f259c4eb0f5462e0747300d6007308bfde9700f36c03952d91a. 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/QZFYY2495997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b9f470d8d764a0b2c71a0a2f4187e576f252dcf4b700246e5d3ad759dc6ffa. 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/QZFYY2495998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd686e74ce36617abc42a062f598068d3a004db3ebce96b0b34deb957b32e2f41. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZFYY2495990.
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 0x288acc7a75c644ac2dfc952270124264f8b1bf910c16602671601cf9b0c4baf4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFYY2495992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf007ff99c66323f19c4d3b9b42ea63774e49d1b8545c926cdf67899ee123a5fd. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZPLS2384176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bb25fe0f8c09275ac1464034ed829d95e0c1268e87e8e5df1a2d354eb2d37d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZFYY2495994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063622d4b112af8cafb30c1a369d90d8ce391cab1dd85a52330b61118c494b86. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZTB52437067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2570421b3cfcfb54a95c934ecc4c737ac2a2bc998122c92e830836172b6cdb48. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFV2488600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cd92bda7921cf0b19884942577ca003c24b46615ab3e05505dbb15fae36249. 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/FRR642500485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cd92bda7921cf0b19884942577ca003c24b46615ab3e05505dbb15fae36249. 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/FRR642500485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a68cf119240a4ad38028225e8454104b691b198e68942b6b49d8ceb6921d8b3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZMEM2565111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98107b535efb592a38ab51d8837d815f602578c3de56e9df3518c0f2877ab06b. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZPLR2537292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7a959241c495eb292122403797df129fc2e578f8cc7be3473e73e213108185. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:32:53Z), 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/QZFYZ2545213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61481df20c31b5a2cb1530768cf929db9de8dc483da2b9ee06605e524adb5442. 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/QZNWT2560881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a68cf119240a4ad38028225e8454104b691b198e68942b6b49d8ceb6921d8b3. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:21Z), 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/QZMEM2565111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31d3a1efeab373b91b61a1f0350037dce58cf73e658059f74f24c7c3fb901c7. 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/QZRP52133452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bbbe571a77bd5128f51cea05d7b87a6a6ea8df594c5a873517f60677e41012. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QZDA42258470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81a99e0bcdcb239c6d7b4b0615ae51d3e9b2ad795b9b8dbb001f865431de6d3. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZHN32317214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9bf6a4f3a2366565e9c4f0016e3c7e9d7317ca92c3ed209ad4c70d03f1eed3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRR642301769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e489d2f17f6e18752f143d7e2ac8faa782f7e82d7b8b07b41729b2e0a8833e3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWU2389926.