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 0xa8d7c3b1997ded0934adc5fcec6af25a5962153a83eaa6d69eea6cb620fdce75. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6192a404-93c3-4ed5-897e-7697373a5503.json and https://artists.proofprofile.net/proofs/artist/6192a404-93c3-4ed5-897e-7697373a5503.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 0x6d0948bac3fd237ba39cab1d0d68ea167b336fa5c31b2cb77fd93fdd0f1e66d8. 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/ITS040300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025d10947431fe64f3e99cf89f2673b37fee934b176dfc1747fa72bf3f623cc8. 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/ITS040300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc79cbac52a21d578ca121de0a3a910b0073c30e995c64651bf6a5d8faf9572. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/ITS040300278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6863f7d6b8d72cea59245c9e7e3a0ceecc24528bdb01fe82e3637d3e17ce073a. 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/ITS040300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb57c27b876b6f975f577702acd78b71ad866a570c1c77b04c83326cca0a494. 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/ITS040300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880addd7faf399d8a1902318341d057da6204d7fb46d7471504644e4976289b4. 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/ITS040300281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f6ac13f9692378cdcd26bcc83f51e51259152189e0670918837dafead54c76. 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/ITS040300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a086b30a130635f79db7e7d05ce1682d6a3f86887ac49ed99ab9478692dc01. 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/ITS040300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07caa380a6db12be2bd1899a107f81794d09e4d48c26761b32c881542bedad2f. 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/ITS040300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc093b7236c68de601050d87e2a3748007e6468a8b029bb1332251a52968ceef5. 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/ITS040300285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf22d5f7dd03b11489e5780b51d1ace00f34a2e435a8d9cfdd1ba750385efd40. 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/ITS040300286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7890e1885156dfdeec05cfc53e9d6108fdf55cfd06d418b958b0b8d88cfe1839. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ITS040300287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0bbe7aacac4b34022c6f51fbdef7fd8487f91a9f62359f69566df12fe77b44. 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/ITS040300288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033b16c1e8f321ab9a1a5d9531f0de121122d0ebb413eb1ec65748be55de4ef1. 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/ITS040300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389a9c07a349b7bc34914ceb31a385a21849d05ec640ea93e87d1e407f9d3c99. 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/ITS040300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6e9b07ef3477cea8f4b74c3148e068e00cf6408a6981ebf5382a2b3d0200a8. 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/ITS040300615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366776b31a30cd72d4009ba7b99023c86212bbf3822f78544daa20073210394f. 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/ITS040300616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c5ce60eb91e411d88fd0781b4d4802616c5e4cbd7613dcded64a46d166aa39. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ITS040300617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b66285dad89252e692d5efb2ef5649f5958f532305b7942118a2cb61f53ea52. 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/ITS040300618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6520286e494da77b0a62b2ef48ff1f836d122535267480f685cfbe326d360e90. 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/ITS040300619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb727ed882e7c5ee67327d656c1e187447cdbdb24120405bac6e23ce3b5d79c6. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ITS040300620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1455d19e36eddcb7923f979b53dfee26d17f7ee59008dcf990daa12caa9da1c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITS040300621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbffce429fb4daa190c4413e394d11203498a18aaf7c3b3c31cc3ef32981ef0. 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/ITS040300622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bccf3e473f6ec7c7788039163def7edd26e3faaca30d632eee5f0cc352e7387. 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/ITS040300623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25ec8106250702de5ebb698a1a352792ef0bcde73ab6ec822a64fbcafd60cc5. 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/ITS040300624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4309bbf4b6686d77d9fb6399a8ff0fc870e66695802b8b1ab2f3adf7288eef7e. 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/ITS040300625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc9da1ac82b5a14d1291bbecf04ca24864deac6cdbda27507fd6f07fa42b828. 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/ITS040300626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843229904104108ebe6282967b60ec4de32151dffd20d93896faa465b3fb8878. 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/ITS040300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e54b21e6e636700281feee79145e5416823fe61e7280c400daf5476d4596a2. 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/ITS040300628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ff1254ec10e3ec32e86c0e41683831091c72c102545892591069e9d35d020e. 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/ITS040300629.