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 0x659a5787b66abe96f743992a18920150a620fc9473b35c792b4a49e49df62cf9. 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/09b171d1-4395-41b3-921c-6a8253bbd802.json and https://artists.proofprofile.net/proofs/artist/09b171d1-4395-41b3-921c-6a8253bbd802.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xf814ff861ce8bb4ea9a2e26dfcfaccfa085b1fa7a5773b0c9fd5b41fa58fe82b. 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/TCAIO2465091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcacf5103de5eee470a58621479ff0fd2a31d0b5f08d3fa79fdeed507634c4e. 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/TCAIO2465097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d0de95279a899276b7c8db8c8d937f648f426024a9efa05233b92d8bc231e3. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAIO2475652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf830c6f134c3900105147bd3336326a6d40d01d2a301857ecc360bc57ecd3a2. 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/TCAIO2475695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9dc812d8376b0bf67b051bf5e1b3718398e204e8f6c53d797f902acbc7b429. 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/TCAIP2475725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34c37e92a807c531a27001e3f63473b821a4cb91777aa89100860cd705bc10a. 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/TCAIO2464934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0bf67957ca9f8431f1311310e17d88209ef046bab368260280e2a719c80767. 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/DEXO32481812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119dcbebc183cb56f68c4bed318f99f62c16eb1a6476c79ee2f3ade203622d08. 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/DEXO32481813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e53d5bc1911782461b94c0007030ea9816676904f4b350fd362d181e44e9510. 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/DEXO32481814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cca5aa5fbeb73cd7771aeab9607a92e2ffdc243660ebce1ce578cdc17ba99c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEXO32481815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcabce2c16f4271bd9232f11732c34e63c982bd5f5af3dc5820170c23e8f198. 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/DEXO32481816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f44fe8ad3be2d900f2593e98f25ce73247562cfb26addab9024a0a1948e0f89. 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/DEXO32481817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2783bc7730fddeb099640bcdaa0256e6ec32c1858d5da9197a2928785adb4ed. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DEXO32481818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56e6e74f252201815599774bed10ca015322deb5b2734ccdb33027114e0f892. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEXO32481819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c72ada89f3d9e31565b498d288d5d90a8ba748ab170401e380fc423f85134a. 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/DEXO32481820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6a8abeb2f28032c63ed957ca780944c4c905e7eb5e23edd28ec038507eebf3. 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/DEXO32481821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bef4c829172bb835e1c41b62b45cee06da38fe7230494df670a7d5a9cc85319. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAIO2464768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7175759a8fa44b438c7ce91cf5a90154c31c77254fe87b068fdd999d4cd96b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/TCAIP2464775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b29dfd07c30ffbbb8a779f3675562120e82f504b269ea7bf16631785ed9cb8. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCAIO2464534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf323591a72d718d5bea05b1bbd18f31e15f09904ad4fba13aeeb2317e6b81f. 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/TCAIP2464628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94c0e0eafd304bf1eaa4cac1e17ffe0271a6a0b1a9950210be11de565987886. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAIO2464633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd43de10884d84ee19e9bb7798cacbd39b593fbbbe14dc6fe36f50c65b6cac2. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCAIO2464637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8849927b9ccaef44d2fe568a607c566772cc86fb358cbb5dae16d3076c63b1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAIO2464638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1495f2bcd7f857a594f90adf0d0f46331bbbd477778b01ed523336ae45ddd69b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAIO2464639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3925725e4afbbbfd47f88d451506fa9eee9718149f6c8ee92212a448b234756. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCAIO2464651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231c13cf8a98d91bf9af39597e1a38079aeb590ab6c132a08ff01053c8e2f6c9. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAIO2464653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2e1cd601517f726e84f0409f46692ad3beff2405bfa6ec93b9f1353a97c4d5. 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/TCAIO2464654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba647492f17bd2c1bdc4007efddccf883349b88cca0359c21d22e77b794ad330. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCAIO2464656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8f9fc6cc6f103a76af73c4b25b3decc97d613f605e528a60e789415dac8655. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCAIO2464658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc6c28a4e7cd93ba73d7334c7d07c51ac4214914470b0b29db49f8322a151ed. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAIP2464662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cbf1dc313ac9b992837bd7664e2eb040d377500842d35ec2390e0f02c1d916. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAIO2464665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae1be73bfc8b98eae6071b08168b94bd347dbb8a3c670b5f6e0394592fe0617. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/TCAIO2464666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493ba1618c1db8f7a3d6d489d3f4c47b0f2dc1bf8668e28ecaa70def21c80e23. 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/TCAIP2464668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6565fd4f885983360c8225b93e0e2a52e0d74e5ba8719ac9699842018ccd6f8. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCAIO2464670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dfd3d733c42d526b88ff0cec1de4393909dcfbb229835026034fff0d06fb39. 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/TCAIO2464674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3287d66b35c1f41ef44d8a759ecb86633c682c5c2ba3b521e7038fcd445f771. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/TCAIO2464703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ed20b1dd048a9d08ea60f81c0ef614a1a9a62bd763159682dcf8efc48acc1c. 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/TCAIO2464680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd4565679a33a12785be2d0c5a254eeb4bb759a93600e71227852d7ae68218e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAIP2464681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06eed1ac7407c5707187c49ef5f86855ed6238ac76d541703b6a02d9babd7b7. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCAIO2464683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efabd4de96aeb8fe862cf30ef9329c1f4f2a31c3bd92d7ecdd1a51bb6ea7254. 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/TCAIO2464691.