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 0x63f77ff8535b1951e1b92819f9e779a799487d2a6fd18d9f0f5685a40434728a. 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/03c6cd96-8ecb-4a50-8840-71574f4c9921.json and https://artists.proofprofile.net/proofs/artist/03c6cd96-8ecb-4a50-8840-71574f4c9921.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 0xafe5c04fd0baa30767f1e050d1fd77fce9324e15112ec37c809c76a66a9a7b69. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEUJ31600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ebef95681ecfb143ef31e5b43acac989d2960b5a7edd08a9bfaeeb60f3f585. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/DEUJ31600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b4c3223051440a39f3fc62f0ce2600c7459c5b05e654b819f7de461c601f6c. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEUJ31600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5769cbb62e0c4ceb36f057e642ce4ef49935071cfa9488772dc0d89351beff95. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:07:30Z), 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/DEUJ31600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d46ae6650cefc5ea8b45dc74708009beb3f273aeca80efc89d5b5586f912bf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEUJ31600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd196f3a1e24a7d2783ace55c3ecb69cf58b41f1191c1e55d7f9ecb819e46c0d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEUJ31600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58879ee7880238be9e4df0adf31eacfbd4a4bfe05847288cb8a299c628745b52. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:23Z), 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/NLZ7A1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7294c4ba3d904ff539da13ce8afcf5875243d76ff442db25f9b55dc0ac2e0302. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:28Z), 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/NLZ7A1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cac8b35a90ee30b522bbeafe8ad572aa8586efb5724c15987b2cbb4ce4f6fc. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLSB71900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784fbad605f5404ca5e401cc568bde4337cd8f428ff2264f2bdad6a63467966b. 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/DEGW11900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d18423d5d2d61d150262c6d4e898b6c524b8b02ab7d8cbb0e18c050b89965e4. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/DEGW11900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02f963140d6de809ea57a8e2eec289f9fabb8fba50422407303156ba5cbf319. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEGW11900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b89a8d10587b0457a843170e90fcec7b2728c854a86bb8a6962090bc1367ba2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLZ7A2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef25e2dfc0bcdc9ffa3b19776333a700c6a2d20601855fe24d6938d6d0e9263d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLZ7A2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3712a258673c8ad98b5413f7d6e4380d09d053bd7e67e73c01cd3a8c6b85d80f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:02:19Z), 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/NLZ7A2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5739041bd348f10104c4dea3707b6ada656221139d1ca1ee0e2ce95b62868a. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/NLZ7A2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54c21ae3e97a0611d7c472b474fe2274e48e029956cd6cc612c81d2a0070358. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLZ7A2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04b4da957866cc080d81bd6dae8f18ca0944729f0e85a1fdfc30c4e741494b0. 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/NLSB72300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46701e128dd0eee504805e6ed2ffdac0d417bb8d0d8089cb55d004d0b2145bd4. 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/NLZ7A2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46701e128dd0eee504805e6ed2ffdac0d417bb8d0d8089cb55d004d0b2145bd4. 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/NLZ7A2400004.