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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 0xb2e329299cee24c8a9731b7cfa72f599d3d3b13b0aa19032cd8bdd4779141513. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfdfd23d-7637-4954-b0e4-17dea219c6f5.json and https://artists.proofprofile.net/proofs/artist/dfdfd23d-7637-4954-b0e4-17dea219c6f5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7d1c524537522ce1b18182433d39c63df6d4aa61b20e339ca1c0c7dc7a0fe4. 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/QZTBF2311530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db4a483b80e5fa9a27845f1a91b4804aead38c10c86211c1e55ecc77632a93d. 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/QZTB72375260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfbbc0796ef0abcd09014896529e4d6747c6afd6db43510d5ea1971e0d35721. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTB72375261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68eb7cabf67544823ba79c0dd78d4f41b5ae82eb0754a52dae2a049deff7ae8c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZTB72375262.
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 0x7e96aca5a788b3e8493bed9992e1cacba98c2d49a079631a7f0ef2e5dc69c500. 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/QZMHK2337309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3713f17b7c5b601897dca0088c1e9c0409ef1663ff100567d20200f1b08507b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZKDK2390517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0f6600c786e51a85acb39a2d3e535a8f3c1345b9ca45cff94c360f489590d4. 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/QZKDK2390545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e0ce0a2cb7376ab9f5e548a11dd1daa66678bd5430a642b3c5beb45b486abf. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZKDK2390538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54858a793e2416bf21d9776aaf467f0931daa562255fae8e5e815e79a0140ac1. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZKDK2390734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cf11075672bb0af1c5564de1b678229b070e9c6b46180a51ffc59d4bff9c27. 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/QZJRC2287563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7a8cde60c270148710d17d8742a01652b21a9b979c4c27ab2400aedfe5b93c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZJRC2287561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa213411f3e9a5477ce3e3a559f49381d218a2dc7a3c8f28f87a698a0f4eb4581. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTH82147918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d5436fcb8ca9a99dffff4167113bd92ce55b97e5bfed9e7f8016619a78bcca. 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/QZDA82173632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b688a39fcd42873fcb404c90732ca35a09b7fef49ec21c749d732f4c83a108. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZD2136463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15607598249abdf1c935800d3ee466f037887efce7ab78e23a5f19fcaf750230. 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/QZHZD2136465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1382b1db49f03da233489ad4a74c9fe92775aca569790aa36564e785c115d7b6. 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/QZHNA2100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75fe9efe779aa202095d621a8906c4d234d87ebeee5e7082a89c5ef57f6d3be. 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/QZFP52181189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8badbdb7219d58bd699d2a4f78c4d5e72acf4b03e6c32f6fa47017033be5d92. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZH5E2108696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd02924b5c2b1898b616c60059f54b5d765407d23e9e4925d0ee36fad44f22c8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM8DG2129048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01421c8bea50ed1aa3eb44d20ba53de9ec2f6363a3fdc6ca8c358a20c0ee0536. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZJRC2069609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae2294865c58ad0950de4814a593e7f51238b9f792755f20719c114e16c2fdb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMHN2045783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea06fb9c6c48a6b96395461aa469c7a834c266db50b6fdb729365ac14d36588. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZMHM2075209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76a51c9adf4d4f3a2df7dbf6feb5e9ea405a4cb67a8cd5fd9197289484e6dfb. 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/QZMHN2022566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb43f90ee683aa0ea0c9f3c3f095d81a80afa927ea3de12ac90278b358e11f75. 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/QM42K2105736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473431e9a56610fec2ec38c4d6c6eb58dc629fc3df7f2b2138bb3b3b5841a8f5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZKDK2101808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd831e3526425e0d03f50f231606e5efc60d905601176db1a3749624c60a403d7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM42K2068948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603eddf89cb29e01fcdfccd467962d898d9c62360d6241855708fc7101f01637. 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/QZKDK2005419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20114e768b9fc95a5633bae6e7489a18d9dcc4ef135598d38a28b622c4490e7a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM42K2077612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa441764bd0dec15d035f7dc1eff73e53ac2fa8e5bcdb81bf591cfab7a8f4591a. 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/QM42K2081599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08aabd5f6a23549eeb9a60fc6d7cef76bf894eec4369aa5d2a4c30f903b61ce. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM42K2083689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ce43de8aa5eb0c28b512f6c2e1dc99447a00e4788c3185ae7a4b3bf28781aa. 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/QM42K2026843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41c8b4674db8941717f758a27b37961fbf04b390d8311eabe1db3fb55f8ca78. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM42K2077033.