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 0xe3c025c3144e5e28bb662b64ad45fa387a4ec89f62ea2b347bb08fad7183f2fc. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59116b40-bc9c-4400-9840-0f0cdbd84c7e.json and https://artists.proofprofile.net/proofs/artist/59116b40-bc9c-4400-9840-0f0cdbd84c7e.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 0x0929ac75a94056f3f68962d2d5bb99d15f88a457e202c48e6f84a02b0aff59ac. 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/QZHZ52288405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1117819ade20a89de637ff9a622ea59d0ccba534be1bff3c6ac2222bf23dee22. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ52288404.
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 0x6b3d7a78733a438b3255e1b6601e4e018c6027d42c958f2dd98e5506f1a1ae57. 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/QZHZ52288406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1935bafbe0c21f58f0e5fccdb7880896654cceb8a9c7639674bb1ad6b5b30d. 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/QM6MZ1870468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109f0afdb1e7e31ae1900e03096c852aa563af0a17e990f541be1e4c06f33165. 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/QM6MZ1870982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5387172fff6b4bd56a31a17686688d59b6ab3995d6eecb4a35bfbdf870b2af56. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QM6MZ1870274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50072d2b178ad8c42da2f67114476267472145c0f7529c02445ad8cd67795b3e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM6MZ1870449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ef52cd2ec24b30a4922301f6c63e5ac5cca5b0fbd267ff1dad54ed050165cb. 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/QM6MZ1870451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfbd6ca4af5ab72637f743f67268233758cb589c3c8067dfe5c5f79c70cb4bf. 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/QM6MZ1871035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eee352e947e7766ae70091e67180876b38495ad2afe100a0465bf525c80fd1d. 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/QM4TX1870135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602d121eb1296b225125fe38d81b308e042ac2cb4f9fdcdb735523f6ae2b5638. 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/QM6MZ1869122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784b8fa0bcbe070d8d82b950170d3d4ffdb9df4154050655e0ce1ca88c2fd5a0. 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/QM6MZ1869877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad526ede6cafe84293634460464ec2c1952bc004b7828b933474befb8e682eae. 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/QM6MZ1870206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ecc8538f9ca4014221565d7d7625549d4b069c5d2ef5fd5fb99208fff3bb3a. 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/QM6MZ1808637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9888061807a5fc8de45325c68c32b709d0421026c11d03999213cc2acc01d059. 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/QM6MZ1809231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58a9ff9c8421d8d32868a638005c1ec96225abd51e0c55960adee33e3c818c6. 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/QM6MZ1808634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822dd002a98023688eadf9ef979566acd607ce17a234e0bc0811e5610d17313a. 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/QM6MZ1809225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1e8b1e7685d6dca6c8fc60716f0909d3d432d04cb2fc050d9238f4eb112832. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/QM6MZ1809886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b811dbc5e073465915f4c5bb3452834c089f31e6361ab03e08e9d74daa12596. 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/QZHN61976679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eace96f696141476eb7bf54f9d00a0f9fde10c9697feb340181e75da73fdd1. 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/QZHN61976677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f25ea3dcd56bda8ce1c59d44d6fef9bd2ea2158b5a00b09f68636ce54b2c26. 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/QZHN61976683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf809ea72177acfd214625cc38763fda3ad4318f5b3a333f2500187582309b1f0. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/QZHN61976685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf023cff88f9f033ef9e6a9065a29bb0045c72c689e5387e5598251cde1918ed6. 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/QZNJY2411682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58619d82ccb8df34e1c7d1d3f42b01ab8afcde022ec930bc6a6209c18569c632. 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/QZMZ92462141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e93e4c87fce4dbb23b36b46060daed4d5ce17afb28522033d7e3ab6954505c. 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/QZ5AB2478218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebd80e27af1e41fcf8f89990b8f71c2899e2fc699a4ec9115793bd729a54eea. 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/QZZ972482887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72496bfb459d6859e66fdfbb33e53cd6cec4ebdbcc87e9a214b92517d063c80. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZGLM2349878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f1f6578d0bf4e663f1ee595a65e496b38f95254264c2dd715ce9e8fde6309c. 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/QZW9L2281745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6973721ac4f9d5378ab2576da358b35772bcdb4412b3b8ad5c078b9c3bce658. 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/QZ5AB2412531.