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 0xb11eed3b9c0f6468391fb9cbd48c963c92aeef0ed1d88a54870a95c70ba7bc5f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c31e2de-5a08-4fb1-a0e5-c179f4f46129.json and https://artists.proofprofile.net/proofs/artist/8c31e2de-5a08-4fb1-a0e5-c179f4f46129.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 0x175a41f49b22a09bdf573200e0b9b883aaa55ec7aa7bcedbd6c5cdaee7dcad25. 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/QZMEP2248840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddb466a3ba9d2e85d092c29674fbe1da1a3f79fac977d041a36c115e2401e5f. 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/QZMEP2248841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb433396f6ea0ac5c2ec59670df1cb3e570f3be9260fa4b9102bda0372e64817. 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/QZMEP2248842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f239c2550e00cbf420fc19fa8fefd9f65621017bcf08e63ef1e3a37f3a147a4. 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/QZMEP2248843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf275edf37dbc189043a12af26faa7fd107e84cc4e85bffa2255df13d31588817. 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/QZMEP2248848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1534972f39fcf81032606b13303461d9cffefad6d16b8576afd43b3447537d2. 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/QZMEP2248849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279f81c1bf525488e0a16da5eca8e3ae1cb5d406c8777659dbd328ad2547e818. 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/QZMEP2248850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8422b149ba05a5f7e4800e6afbf4eeb1b6a2761b24316b9bbd991c3e3d2eeacc. 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/QZMEP2248852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf644fb2023cdb5c89c9d564cf203159d804fa1f07adaf59b58f06bee5515dd9. 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/QZMEP2248857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0d407e957fd8b5a0cf10fafc5ec743ddb447a58879b051ead3c359029cca33. 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/QZMEP2248859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae4691c6659ecc2e32849b737b9865d1d11cb56ee8e8ccdd506161011e65585. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QZMEP2248844.
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 0xe09bff12982d876a060cb1fdeac933226d25c5347b63653aa6f7615ec455375d. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZMEP2248845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8319b6f789dd1a45be6a86277e123c1360d6e4f83023a83de49e3c6e8b2b0d7. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZMEP2248846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2a5a2d466d7235cfda3f39114f151b133313734d6984a24fa1e4e02b0eb787. 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/QZMEP2248847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425b2812c6cbcf407fd335c4069f0a8e7cd661e700cc1161b98d2a7439b09031. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZMEP2248851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b67d774d4e2f50a31ff069aaa926d69b28432410ba8baffa0ad643140dadb2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZMEP2248853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95c40e4fbef664ec1e900fe7341e0f0ac59e87fe34805b5598d9508f93cad66. 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/QZMEP2248854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92bbfceee407d5441234f405f9c18c72e3d295e0f70f349954fba9d0c7292a1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZMEP2248855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57af1d5cfd995ddc7ac99d130ad49149c114e04596e232ffaf53a8a66ae3e8f. 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/QZMEP2248856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978997757da2482f92157da031f1c8ae4de3dff654ab11cd6d8ed3d67a04a653. 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/QZWFR2333765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2001ec7703dd09f51d3dc4418962da66ae6b7b81cebbf49420a9d253f7c8edb. 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/QZTB52371500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a9688dfacd06b8d9d7b469d10414ea6386a38c30a911a43507d5a25fd7448a. 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/QZTB32344527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fd1bc91d5c546eaa104a9dd7fa4838e62259ff63aa6e294fd47842b7837da3. 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/QZMER2334767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b5e5a2f2a0a94e2f2bf67e9b34f8902d31397f0112cb249251d1f3bfb6769a. 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/QZTBB2223420.