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 0x8c5a54b029f906d7ae62507eab91b6d785d3c91a52045716c14b7fd7be7b16bd. 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/9cc6e621-05d1-4ee0-81dc-6b74d8ccb2fc.json and https://artists.proofprofile.net/proofs/artist/9cc6e621-05d1-4ee0-81dc-6b74d8ccb2fc.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 0xd0aeb62e14cab03a4b53499ce0216950fe0c9ace63a07a4a7f470608eb42b1b3. 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/DEAR41628091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56edb94f9e19b88de1dfb701945aa13fe5f57724bd8b441c388ee553db52d0f. 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/DEAR41628092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae66ca0c2b7ea284b9e701ad1af0a0deac2d3598aceb469a6cc85a0a08eb05b. 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/DEAR41628094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481287adb2536b794508f292284c40953031b1c7920eca80d3994d9fd88f0d7c. 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/DEAR41628095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6611f9e59072d2884b3f6cc1c478478cedb162717e1a7f9833dba5f4319624b. 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/DEAR41628096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21d87941cfa2ffef3b763cabf611ede64aead4f4f156a40f736bc2c76aef165. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEAR41628097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9597c73d618bd963dfb6dc19bb00d2b7fad059c7fda1ee5506cc2de72728a8f3. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEAR41628099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037380a792ef5a4928be4ff01ea38f98a632ab0dfb0b6b41343c502ad8eb7399. 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/DEAR41628100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eac26cf83815dd79b0888dd32f85b2e575545a8a444d7e26b1ee74bbcacc94c. 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/DEAR41628101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd279371453ef69d1c73d86ea61ff5fa6a647d73e7bd650c392e11cb9349de3b8. 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/DEAR41628102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d98130aa20fb4334c36cd58e0bbdab4d7af9cba94d7830c31ec23409d88692b. 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/DEAR41628103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2844778e3f617ae4b690f5d7833b715d5296da7fb2bcd8fb94190c1270147ce. 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/DEAR41334718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442af2312d7bce64a3fc464130454c963a685fe6cf90902c24aa1e172a0dee77. 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/DEAR41334719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19b0ca6a3fa535410049937521c11b3c752ac6ad03f2676a675d8c57bff872e. 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/DEAR41334720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a5bbbb7169f5540a9b467c1f846ab6c2f501d51ca827b54011fd94e6bfcd0f. 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/DEAR41334721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d66d2995f256969358484f7a15ae37141369df632a5e0b631eee8aa7c02bb56. 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/DEAR41334722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349db67194f9e06fa25118c81c7aa9a55fa4a76801099b06cef3d3f86a97fc37. 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/DEAR41334723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99c3cdd4aeefb6913246a26321fc60c9feec932be687b14c0fb3104847ca8e0. 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/DEAR41334724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9590f7b0504b6374357c3e059e9984fb6778ac6d3f828c5b8732a37ccb66b60. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEAR41334725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdebfbc81b843c9c15f47d852a5cbb53e8404e366283da7e56e7661eb194a78. 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/DEAR41334726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1be5e78f123cf9f3fa75a5986432a205b6a2abcc45a306aab982bb6b6f8909. 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/DEAR41334727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c59e3468377069cfe2d2af18d846f4c0cc6f74ee7ee0eb9b8a128dd3e484f6. 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/DEAR41334728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4863106daa06f9f5d3c225d29020678c0ae3d3e3db25540e57c779229de79d45. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEAR41212694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2948309181124bb0f2d5aace8104ab342ae281ae4944e49d715a3209b93dd7. 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/DEAR41212693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce6ae97da4e1feec10aa3b1d4207518769e23798c7e8a5709f735bce76d03e7. 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/DEAR41212695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabf2a95077d013cc9bfe0fbe4f73ff9edc8444973605c2461afa92ebe317c18. 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/DEAR41212697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ec426ce483cd3ffecd7dc88bd9bdb7776d67ba46b89993b824aa54deb91dbe. 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/DEAR41212698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87df966efc411ecbab0c4ed84aba89837fb3c2e4d6c584022cf883d8e22127b6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEAR41212699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d47c89c2d13e958eb22db6a67d52ce67fd9b21057c4e5081ac04633ddf5c67. 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/DEAR41212700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baa8a71a10257db3c4ad72e1d93b8ce5662b9462a5962e914ac0fcd7e672400. 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/DEAR41212702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e8618f2fb1f3d1cac2ae0eb2302dadc9b7ace2817324bc4d551adc44493deb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEH742177919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf1e1183903e6deb39b17b1c9b08f46a880ef4659b2982d5172d765f1b9e898. 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/DEH742177920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81e0319b9d751c6694c15d57bac48f087a24959e64e6c24208a298d0fc2b2ef. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEH742177921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ca2d8b547190342b4778a533ec4f241ff7f0a74deff0909adc1393763a3ec3. 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/DEH742177922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe06802ecdcdcd0a06699cc291882d676c3a755e20c6474bd5fbc89bb2fb42c. 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/DEH741911999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb703e9e534f3a7ae9900292722ef046eac3ca70023fc38f00a808aa91e4662a8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEH741912003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70522dac5b5512e47bd0f934a6ac55859fa62be27f3ae20782bece267c389240. 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/DEH741713659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ba8c587d4e94be6666d419f362b28ea65fddca5811e166ff81ffd59253ecf8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEH741713660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a050fe2647200149233c7928b13453a6654071019f724da8b86866e28d387f2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEH741713661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea0abca7a9ce8bc256a4eb22e4940bbc36d78021e498ef383b622baa56eeceb. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZ5FN1814872.