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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 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 0x91ed82db28e8e0a6eb14f27c0b3a65eefa49f7eee63ddcc3f3a57d235b8c21f3. 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/caacefaf-eb5d-4a15-a366-16b8779a0d64.json and https://artists.proofprofile.net/proofs/artist/caacefaf-eb5d-4a15-a366-16b8779a0d64.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 0x0235b50ff9b9a38c202046e3e314e2824761cdcb199f8b02b7af8cf9d2cf9d77. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/KSA012186045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ba1d3d81ebb09e446e13ab6a1bea2307a11c37c57dfa9b22a18b8c301bdc4e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/KSA012186046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0696367cab31ac095421c21ecf76b1aaf474d2a618057c868b9787a8f91b4151. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/KSA012213681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb390fc97a09c951e1b733d1b43df71062987fc59891c3598991204526781fdc1. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/KSA012227274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94390ec00c07c95eb3c11110bd92087af06d8d1977fdf97fa1c4ca808522ab61. 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/KSA012228884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14a07c8f1e1ac5cefa0ff076b5c1657d619ec8a3b831c47a6d515670a39dbb9. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/KSA012237969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b2d4b16de654c8dc62652ca547fcbb3a10ce7d15b1adf5cd7a46966ae570d0. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/KSA012240939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb288e53edf4c12ce9d7aee7ad03af985500fcd6e3e2fc4afe84868fd4fd54061. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/KSA012245872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0ab0b6aef1eb2be70fe98455f82ee141f64c2daf60a2edc1925c87fbb7bc61. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KSA012251022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627f3ba5e1b073fa1225e3d2481050814db3947cdb41b88846a4b9c993d726f6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/KSA012257939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b71ad5fb76cb59f077eadf3608894e07c2786302c822d29c30f9958830c729. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/KSA012260699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb70ce36f77737a08448a2fe33bc482d93500c52bd99939fa3bec1d1bdcbcaa2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/KSA012271687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8919bd4cfc2942176d088cba610cf53ea44e5c13bfbb0796bef73cb348bac0c9. 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/KSA012273115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f05b06103c4fb743871556ed56b2c7e4402cb51db8f0c8ca6b2f80bb3b0250. 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/KSA012278393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efdab54e13613a2add2473bc01477da047afbbdb2027b66c4dd96138a25bd74. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/KSA012282951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c9727a7158b1ebbc6a9e9ca9a7d43c6b60ac5dc88a45b4e50395d905da102a. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/KSA012290753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dacd542d3254ecc770819926966df6f424d2836115eeadefc0a7dfd11f75ab. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/KSA012293446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbba403a8b87d8b3a1a10c4a9d292b2bbfc7e98e281164da5d18ef0485d6dd2f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/KSA012305459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c16fd9248c8a1b6ab8e8fab2cf06971b19130c9617aec7bfa9daa54741ad87a. 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/KSA012309370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a53a86076505b8eb9266237837d3b3c0cb66c92136296f5c1df01f595d8d7e. 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/KSA012316887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429e0ee04bd4b8e9b7c82f935d0036d3693d983c077b7bb3932cece7a4fed5e5. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/KSA012323222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6371ac2263ba46432d0447a3bce0b40790ea51517cc2621012d17dfcd35c452a. 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/KSA012328766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d993300dc125170a60d4f705c168a2fd529ba68910da31cf01926089ce50e34. 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/KSA012336800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c553e5e7c48897266c58afc3557ae47286b1440d9f7c97d627772f9892cde7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/KSA012340681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a92c29fa4277519acf0fe42347457ed7424113208319b03d8299dd1a364d491. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/KSA012351465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b196f240636dfab695edba225e342077e62b2f32256353ba887b8843af1768. 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/KSA012355486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8553f2ba85892504c03292371bd59df27087a1e60689d0ad960922371dea3b89. 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/KSA012361220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9757f6f77180489a98b062acef1309fb2113381613e7b62b10a2e416c3df3cbe. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/KSA012367106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f7d3cde04a339d6f56f28056c352b7f23f7fab180ecdd23fe191b0669ce04a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/KSA012373971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc353679782d4f9f2d3bab30343ffa35338165cfa301e190bb913cc095b9be2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/KSA012378028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f3a30cde2faffbe24094a3fefc5e0d1d6ff4b67cb23e04e92a98e9c1867c6b. 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/KSA012380480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017c21803e8daf6a87f8cc35e6bf0508c2357f28997af6d85f87af6e990d61e9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KSA012389785.