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 0xae9378809c609cf6e0870f464aa0c003fe4105ffebf8a89537e09fcab6cc06a6. 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/1e9fa36b-639d-4b2d-93e3-afd492dd9b6f.json and https://artists.proofprofile.net/proofs/artist/1e9fa36b-639d-4b2d-93e3-afd492dd9b6f.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 0x78d6c74a919f95fdc1fedfda6e5e4513f9fe175cbdf38583203d31453c228512. 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/PT7DX1600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6816afd84f9be61ff038b047b2309fdb4a0027cf40870e881d87092fe00a12d5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PT7DX1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c7eb65bf5151a886089bf8b634c9bc04ed19ba1920a52dc8e122d4751dae81. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/PT7DX1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d15738fd7a96f85ccad580db670a44a9306ad93ffc0968e5e07706fa3244cfc. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/PT7DX1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf78086cb6610fcecba9ebf36a61878962c55b233e0d0e184e9dddc01a037f4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/PT7DX1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0645840b7251d49f3c8cec5fa8e2e6bd7d799e484bcf78f0ac71eac518da9f46. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/PT7DX1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e740a59fc80e54f98b76142b6683a1b29d9f5b4ac023dfbddc61d900215a096. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/PT7DX1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc80e5fb97d005b8d2a4356f6cc6c94a22fd8dea2275c506f9837a17951cb91d. 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/PT7DX1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7c55bda047b9418d107f5539c558f0a46b6029c7ec0c7b38f398c5dd83221e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PT7DX1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43e7061c9d0c9a4bf9e8ac492fc84447f136ffe399bb47e8b37c5f64f34bfe6. 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/PT7DX1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8400100ab9ab04bbb337aeaca95b646d7883e556f67dd546ce4435b107b044. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/PT7DX1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd464cbcbcce7edf13fc0d8e262c5820d1f77dbaa9ba29eb439d2bca4b7a7d2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PT7DX1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5983723743350b5f7e549bbe271ed6df9db524b13afc68d2cb4ac573d043b2bc. 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/PT7DX1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae99753a73ff0a6eabafe2e16dcbb2ceb25c0a8a36a52b51060d6c2136684a85. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/PT7DX1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17efc4159795780bfc8203be569461e1b2d57e4ba268ccd2036919dc787afeef. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/PT7DX1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057ea7d282cde96fc44f01a33bcd0c48befee0ad3721112ea67428d63feacc72. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PT7DX1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bb1f4eb06f656645afd87f0df94a73a0f834009814519c6769b014704e3ed7. 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/PT7DX1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4d3d5a421b238f04bf6fa73f42be1820003cc3910d679144172b85754cd75f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/PT8HX1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4664609b5416f6ea7434557d3f069345dc5c0109fe49b1ab6d2837f0625013. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/PT0FG2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9c1e34079238101a0160225458776542df148b0525186bc69e85f9ac7ff578. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/PT8HX2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb85e2c14434a3c1b2e9620c61a9fca05eb36e0060ecbf7387720a2468adf014. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PT6GJ1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dded91a24748708302906ec0232a58c44ee28177d0cde130da14aa84b7229d0. 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/PT8HR1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86378b3b42aeb8cb441110a3889a81a955d46bb327c0fa6bbb9d666973088aea. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/ES71G2146854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90655a563d8b3d82dcd3f44fa7b7ca3af3e9532e25dabf145d119329ef9e288e. 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/CH6541886080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86378b3b42aeb8cb441110a3889a81a955d46bb327c0fa6bbb9d666973088aea. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ES71G2146854.