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 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 0x709e3fa23b9c1604cd68500c5c8b10cdd4a6fbeee69ad6fa52aab289175172c0. 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/0da46768-f3e4-427f-887c-41902e426ca3.json and https://artists.proofprofile.net/proofs/artist/0da46768-f3e4-427f-887c-41902e426ca3.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 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 0x429e56774a0fa29f2bc36c2e103332bd5d53882f9bfd22925503cbefad6abe91. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ5AB1882805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d88eabb67bc3337552144bb7a971cfab69aa571a346a4e4c91f8fa8889d301. 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/QZ5AB1882808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc520dbafc1c91a5504cbbf51f092bffae575bccd969f239aae2edd61e27a2f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ5AB1882814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efceb948dfe92b3c27659562eac8f307b6656451a2c5793163547ac02d9400f. 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/QZNJW2184419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6ce59a3b6e84d6d2bb1dddd9739572357d9d61d0e55c17b8524719f950a54a. 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/QZNJW2184420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b82590c179e9fb23d92e05a9aaba8fd12eac5e605663afa3d3e32f5e7304f7f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJW2184429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efceb948dfe92b3c27659562eac8f307b6656451a2c5793163547ac02d9400f. 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/QZNJW2184419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6ce59a3b6e84d6d2bb1dddd9739572357d9d61d0e55c17b8524719f950a54a. 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/QZNJW2184420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ee2342affdd9c3d257a534539da1cd677e54d038bbf71200eb3148e5f37b9b. 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/QZNJW2184421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dddf20f39c081b8aa1b452da6e3a16bdc2d5185d13c60c4f58c48bf8ae35f3. 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/QZNJW2184422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8557b8cff2af401ca8ad93a9c660a06cb385c9ef2293f2353acb3b7c56cf5c. 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/QZNJW2184423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde74235d57e9d996b17e2e75a4eb770f7786e3e7fdeca7af0047c0b2758f344e. 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/QZNJW2184424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295144681b61d7251dc3014e6487a4c18b1e2fba759deea894bc0b03e866cf56. 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/QZNJW2184426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b4c5ebdd1f73fb27c6f53dd6038015345976db97c86248498789dcb279d07c. 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/QZNJW2184427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2835a3e07fe1e08fb2612496f787bf2839cd369660875a1e2cbc22d56366f964. 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/QZNJW2184428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b82590c179e9fb23d92e05a9aaba8fd12eac5e605663afa3d3e32f5e7304f7f. 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/QZNJW2184429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd654cbc8b29dd9d1d829f6742f241686b5713a0cdbc0a05277b428dffff588d9. 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/COA6W2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8155ea924425676cbd20abd82511571ff2369137289376896a69d4d7f59a828. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T15:40:06Z), 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/COA6W2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f409152b174089b1852e07fe738881225213b72aa97132bdba07c0d9488ae6d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLM2500978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b54b0dba64e37b52702a474df06a79cc762d126f90be5cb3625c442622fe1d. 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/QZGLS2576130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f409152b174089b1852e07fe738881225213b72aa97132bdba07c0d9488ae6d. 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/QZGLM2500978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc34a1f45c1fae69997403a935670e8a430824ba2a9904adca768936a9b9dfdc. 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/QZGLS2576131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12bda937dc188cf6b2176f137ecd9492e27fb1c8c33d2d6ec136c7c5c06e4e3. 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/QZGLS2576132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37842ec6c29acbb62debd88ad5bd84c53e03021042416bfea38c679111eec90. 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/QZGLS2576133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc20c77c42c0d4da6bb116f83a673c29f1ee0927db93a2d5395945852413661. 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/QZGLS2576134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac086455951a448ad8494cde26fefe104cc47bd9dafe3d1c1a5a7c35318e11c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS2576135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7466dbe7f96f22c61c7d7a750588e2b0f0a527fb833304eb6c628183d3c6e1. 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/QZGLS2576136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfdee879ce1026e768e74f540227c056a4a41a6e5b58c6a44196e10f4a58c46. 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/QZGLS2576137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe884822a23fd6b97a4edb4ce03e4760453ccf86c37291dabaf1653858c64759. 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/QZGLM2555753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe855d07d9d12124d8c4da5cdf85d60c6457812aa1c5df8886fc1287db29a9f1b. 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/QZGLS2576138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604485bbe35c3883fb5dd9e185f6707ef675066dc44fc9074ab37fa675f57c8a. 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/QZW9L2226870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8b4187417646a922c5906c4bcf1991381dd69ce40f3e42564df56f06a4f717. 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/QZW9L2226871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb5ef35156f141a1369158bf9ab0db308889a0446bfc8298cf4f2bf817bb068. 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/QZW9L2226872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9efc9b036a6fc218933adde9d6b28376dd5e086d3c6a90a3184bf3a719fe8ce. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZW9L2226873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8702f9f9c02c885d2ef5b4beec39da541a5e233eb6c02fa7124dd32a14093e7. 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/QZW9L2226874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb934a58971dc0a4f887878fc252fa4445a4d7d0649f2bbaa34e655607a198fad. 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/QZW9L2226875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9890bb51a68bac70898afa38fb9c11a3885fb08f209b7bf23c6d24970595918. 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/QZW9L2226876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac3c74a972f68ba6e043890f752cc70d5955dbee7d08066f78ae4414eba4c55. 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/QZW9L2226877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee75abd079a024f07c086baf320fc283abf47fe39665f578ab08fcd6554e8313. 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/QZW9L2226878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe781d9ddcc18f36f64b4596fc41d9ab4c4615e4749f998571c505908c16a9d2c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJZ2228345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc879ea0c40c13eb1325e9256f7e8c240e0c1c42fa64c68637d1732321fac4363. 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/QZW9L2226879.