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 0x755d2e408c9b26a4e4e444f4c51ca30c616143f0379eea1a5c3208ced705fc93. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f461568-ee46-4b96-b99d-2cde6d4f4ca4.json and https://artists.proofprofile.net/proofs/artist/0f461568-ee46-4b96-b99d-2cde6d4f4ca4.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 0x49b685c758d0e64ebffd4bddd923e4c96cbfdfc19c1a14ab0cce692b17a9ca64. 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/ARC571400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f79a9f510e91038f3012712c5c8b0ad23eda74dde5d3b4ff3e583011c7e63a. 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/ARC571400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1a2287b78686e8d11641cb5ed8f1109df236746e7d7d12e8970ce7d8c30fb1. 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/ARC571400222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4432f8e98fefc7b14ca1e054630225f43ee4f8efe3735f8fd2ae607c0d771236. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARC571400224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2215da15719c01395e41cfb1d4be7885bf9966995aa21cdaede436ea3af9345b. 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/ARC571400225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0acb910e217a9b76321f1d7d72695134ed25a44c3ed7462289878d80377ded. 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/ARC571400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dfd8d6c61d39282b0ec9b1fdc5a82025fcd78bd826c241afde22ce04dc31f2. 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/ARC571400221.
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 0x43ce2170d3efef64206bd95cefbd2232137b9c1b6738d7247d27876d28c11a23. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ARC571400223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec04d30c09d90acac0f3bc7c3c8e02d4446fa857a36d7bdf4f60ab22c4759e0d. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/ARC571400226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3185678417bacb51c0c5790c86677d4bc7d90772eb8b0877c2b4a60d6b66a8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ARC571400227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc512be611ea59993f36c46dcf894a36459e2d74d22a152aedb0db89ac57db763. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/ARC571400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296da27bc9111909fd1d333baaee494a609f969b8c589c4e97c77fb274ee63a4. 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/ARC571400230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bab32b5a1352eafe9fc7413c2a75be4052357756463cb64dcb86a9ce3df6ac. 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/ESAAI0268951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0285074438a2f47c484bf1bb4e42e64c8353b31b01a9e72987b4ea004693eb0f. 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/ESAAI0268952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801fa343ee8b5a70fb76eed6db7b4be2eb097c719fa33f976a81a84caff320f0. 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/ESAAI0268953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4742db4fb112a00f24f834f38c55aa9f49ad0239d89bf84c83fd9d0754dbc2b9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ESAAI0268954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb790ebf24406ed3575f04322fb9e164ad4aeba385d77e291d65ab0c0e3df11. 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/ESAAI0268955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63360812a3f6a87cf499001bb09fdaebf570f28f95b4c4cbccb53a04a222727b. 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/ESAAI0268956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487cd9edd56600e90808d4a8e2b4819df06fac0b4e7db657c911305ade3a96c8. 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/ESAAI0268957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a33d712ae2d0181392ba2788bd1c68b979968c8b15bd52ace77da2895558b0f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:44:28Z), 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/ESAAI0268961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2fab7b1aa54a61894a48ac6f1d3f7c0069cb90eab46ae06a972a1f95de2952. 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/ESAAI0268958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf0d64569a569068c42dfd64c3ea32fd5a06a8503b62c20f96c44eaf23057dc. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ESAAI0268959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d73983f26c48a0bbd6e489bd22c69d111f42741dbeefe294b1d8882e896f31. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ESAAI0268960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb38c22ab5ac190cad6180b0b1708845b7e35f648cad23b9e193dc200cf73ab8. 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/ESAAI0268962.