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 0x84c2b6686f4338c65f842717751fd2ff9d9ec4715a5b69795b1c2ae06d58193b. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25fcf3c2-e5bc-450f-a938-95a95e523f58.json and https://artists.proofprofile.net/proofs/artist/25fcf3c2-e5bc-450f-a938-95a95e523f58.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 0xe5330ef98bc3054f68451e39b392d97354bd5c4b32825e4425db7b85056f3cf6. 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/QM6MZ2436847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96dfa70b28c8800e6beaf22505d9f22213b4a182a115b1d70ebf8a7aa4cf38f. 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/SE6132300737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf00db229fd6506fe7a98235bd30468be4c99e76f2e70f88a9585994532b924d. 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/QMDA72366654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114bd42e7f3e11565656ca86e373112dfc7797653ed2cd70bb838d7ef0784e08. 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/QMDA72366653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dc9270cc5f5a3f4e4b9d4204acdd3b59ff650dc5fe25bfa6bb9fba8b2e26e4. 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/QM6N22438035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445e4efe5ce54ee83dc5909e8a186f811660100f32d8fd7010966bffc910a6a3. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QM6N22438049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ae49f6654238f4dcb88840e7302b977c7365f48d940107fcd72ac5cb47d271. 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/QMBZ92304172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c2481cf09301e163412d2c3724ffbcad8150ab3bbda891329e0786c3141d6b. 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/QM6N22438083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66567806b36d47b6da16cd1df21e381404ebe0a329920dd1cad0245fc9cd00f2. 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/SE5752375364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b554681bac66df927b7f56f6dad797387464a0ee9b5d77991999454fc9b4dca. 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/QM4TX2407262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5330ef98bc3054f68451e39b392d97354bd5c4b32825e4425db7b85056f3cf6. 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/QM6MZ2436847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114bd42e7f3e11565656ca86e373112dfc7797653ed2cd70bb838d7ef0784e08. 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/QMDA72366653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96dfa70b28c8800e6beaf22505d9f22213b4a182a115b1d70ebf8a7aa4cf38f. 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/SE6132300737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66567806b36d47b6da16cd1df21e381404ebe0a329920dd1cad0245fc9cd00f2. 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/SE5752375364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf00db229fd6506fe7a98235bd30468be4c99e76f2e70f88a9585994532b924d. 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/QMDA72366654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ae49f6654238f4dcb88840e7302b977c7365f48d940107fcd72ac5cb47d271. 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/QMBZ92304172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ae49f6654238f4dcb88840e7302b977c7365f48d940107fcd72ac5cb47d271. 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/QMBZ92304172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96dfa70b28c8800e6beaf22505d9f22213b4a182a115b1d70ebf8a7aa4cf38f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/SE6132300737.