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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 0xec8576105c5e9c47650120ec927739e31cc2db71d228fd7fbf2dd4b4ce375ea8. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e3411fb-fd12-4039-b5ea-0411495adbca.json and https://artists.proofprofile.net/proofs/artist/4e3411fb-fd12-4039-b5ea-0411495adbca.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf214959016e11937b1a9cdea525d01317f045c9b550cf9b5573762bdddcdb8. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/UKZVC3493194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf41e7b2ad0dd45a42c738c4f939e315aee7fe5dbe4a232b8e059c92c91b7404. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKZVC3493166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d14093b66e1a13f6d8959a6a5bab3ac06712ebd8ec14efa7f0ee02f24a9bd3. 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/UKZVC3493180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13977c07e17378c5fbf8188b0060798e5efa39bb7b721091c92eb0eaf83d36f4. 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/UKZVC3493205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f045e113b1c150828efc16c29944009ab28915b1f1d887f3b9b4e46086ba5eb. 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/UKZVC3493201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f6e9cb3ea5a76656d0d8f68d8abac0dd0a91b7aa5d63ddcc3138132a69c408. 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/UKZVC3493239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67098f07645ecac68bd2723bbf30443158dc9b72ece3d346a5a0f8cb40983a0e. 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/UKZVC3493200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c9d82f22994147c0239e20293133c11e69cc86f7521fa7431fa556226e5eda. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKZVC3493175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32cfdabd257f46c1727b3f69ad066e2f0ee3a401e0bee6bdd27ee77deed3fb5. 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/UKZVC3493223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6ea6bfa9c9f977595793055972213f81192e5ec3f256629c17f8abc5815870. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/UKZVC3493185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e100d80fbf1a2e2e0931d32371cb0b7557e08601ab3f56c49e6daf7a225fe39. 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/UKZVC3493209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec71e4146d5e7717f6f701a8ebed9573540ba5038de5f953fbe54b1496ad909. 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/UKZVC3493155.
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 0xf42a84678a0d08ebc4c4e205e1ce3512e1cc8dcdebea9a29a2ba20a793a5c8b7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKZVC3493189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc789936a59d8025d42f6fce72fb62f7ff6b82c515f71a15111a6d1025c87a5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/UKZVC3493203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a8b6cd40043655ff6305f3d19b9eacdeb49096330457103c01284509778561. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/UKZVC3493187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f05d2ee40742c332603ca8f8e1d024f3b366b04a9ac9b549e316944e2d1450. 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/UKZVC3493172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddd384f7170eee44ec3618d5bee2659ea9eb0d6b2e2db824bf73202c75f6a8c. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/UKZVC3493238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86014accdcc4583d13f9e8271a4b807989f03318bfe9ac11bd0e4ecace567dcd. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/UKZVC3493153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477298f1bf8a66b7a6af01f0a5d8f24cb9de41eeb4f028b56e244957f8135b6b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/UKZVC3493176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab6ea45cf695be7aa2e67839da8dfd1799325d5b20a108c43901345784b4f21. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/UKZVC3493206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765023017e9bebd7d20fd129e571c23d56c7a0357aad93498e900cf173ac30a8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKZVC3493240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5b2ba60181bb3e4f0c3a65eabfbe2f3288c936a692c1ee03dc43e3c5e0a6d8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/UKZVC3493211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e169d31fb10105be5bb43348dfac397ddd1896b305810b6538bb9a4b5a2648. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/UKZVC3493243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d88913de6e294c16a2ab4e12ab67fc23805fabcafc953593ede0c6fcaf571c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/UKZVC3493195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42641edf90c5fa02c652f08a445ccb65f49f2991f1061ce072f8f9cff66ecea. 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/UKZVC3493224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912ec9f94619040980b2bf108969d66130373e824a07898607fc992f3c957d48. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/UKZVC3493147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5415d9759509b409c9a2a8e47f193dd78942bbd3acba63977784d3fad807b33b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKZVC3493242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312dc8a3f58a4b09ce99ef2ceb87b5bf4bce3ef3c8e8413c25e1069a95ad46d8. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/UKZVC3493174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d77a7f9b824ee9efd28587b564f6bb597af4adff7170ca29902a00913f461f. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UKZVC3493150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b8c7a37252ac76d3c218630b8cbbb220db76ada8c107b44d495e85d40e48aa. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKZVC3493165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0b985f091fb7230849a2ce448a6c564eceddcb0d5a17cc358dd582c9d4b36c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/UKZVC3493181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3222783b90f8b3f28aadce418153d7b5a6c2675327b97108674a38923fcdc6ef. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UKZVC3493156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecd9398a4dc4d912cd01edc4a8cc02a81a158d0731e88e092eb32ddcd773b93. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/UKZVC3493236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc784a22e0d280837332c5f18ecb54dad4720590c5b861b025b7ff3c16404b56. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/UKZVC3493221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96be9121072194d553785723c26d50f3e4ccab916aab5a8ad23a4f43e683cb1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UKZVC3493199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86e7541424720ed5dc60840523fc00a3974f83eb2fcd554ac122892b5ead0b4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKZVC3493235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93519533c8d05cac169be9a58f46232cc4408c84027f051c1edd5649caf2bfa0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UKZVC3493168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0f40b5745bdf5239bf86c02388a55f75a1dd7998a86b9d4c3564dbd5cc937b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/UKZVC3493190.