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 0x71ecbbb8b86b0dafdc6a787724f1d353e60d7bf6bfa7c24b0f9fe573d562a4ef. 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/16ee572a-90bf-4816-9592-c507373fcdea.json and https://artists.proofprofile.net/proofs/artist/16ee572a-90bf-4816-9592-c507373fcdea.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 0x6fda16fe400c2863a7fe8a519f6201718d575cddba6b1eaa0a10e16b095c3780. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZHZ42171800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205c646096e95bebd22abea98f4444f6a842f66cad60cb9b1f9d6cea24a33c1b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNJY2169207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579cf42512c6b74e9e380634222abef6ad84673721c51c468439dda1a773b867. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNJX2165169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8eae5416935a5f9d1b8e02c0389c0d8a584774c17347448da2e36106a55402. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTPX2110577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b42b819df9a1856dfb2cb50a46541f22bd76c449e94110f76dc424fb60d1d0c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNJV2202457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e2e752cc5578744a392392ab9598747ffeba3ae841b75ca8d14556bd141977. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:51:51Z), 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/QZTPX2191797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deaa2365c70714a2083b30ba7d61301ac6c0d3e33991d669fd4d522e26954e0. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:30:31Z), 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/QZGLS2266532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef03d9b16948fe2b4d9e468bc9bb04fb15baca3de4afcbae4be75b0c14015fd. 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/QZHZ42215780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2864c64456f87ae4bf139f718122b6a25e8919c9e7c119fae7c5d810213184. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHZ62269577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c724ec857bfcafe34af8fad644db75a54c62a669fde4fe5772fbfd76342ac6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJW2285065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9681514a62aa3ca38e26867d53333407132a408c18cfabf5fca6b8e5600cddb4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9L2270862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aa4b84667eff2272cd27ccaa5691b0055403fc28a6646db30c4959438d90f5. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZW9K2208776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f0c4f892049264299d389f59716de7c315811ae0b341ec353e435a95873d40. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZW9N2217615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4708b0a16292935b43110c5d5b2b756aae08c44bdfcecf1b004a383d1df0d3a5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:36:39Z), 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/QZMZ92392674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccae4b210cfdad3326f30cce30cb66c29ae48f3a58c3358c20840b43dfead42. 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/QZMZ92379512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185caa0cc3547f87b504c32c200006b2748a5091389586c86e1040ef136ef5c9. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTVM2380472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ee7237bde94776ddff531681b5bbb5c2379bcc3f089c6b3a8f19bd02f7711e. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:37:00Z), 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/QZW9L2326847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1310395b5165881297e157038efb65caa24b25a92cd73875e7c1f1df8fbb4f46. 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/QZGLM2474949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129460f39e680009184684a1f617a09be168861f83894040d5e4277791ea805e. 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/QZNJX2492562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8c8357c48970a54c4df962a5d828ec31f37e1dd687b9a494ff467b8d3fe432. 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/QZW9K2422893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f633a5ddb1ebd31fcf45d8207b69806f10ff4c595072134a8d2d6ac72815577. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZW9L2426910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bed92a012020d7ee4582149e0cb786db8139f2a507722e7cdc79cbce315603. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZW9L2451946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69acac0469ca34ff449af7e384dc244629192d307512900b0543d8c2ca98b95e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZW9L2426907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817a1702f0cfd723f24d9a5713e24d139e02f8325141cfac843e456bd9ea5e13. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:33:17Z), 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/QZGLS2584798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553bf795f0f552cdb8810b68cd7ef8620752497d93fd8392e1ecaecb80ca9aee. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:46:39Z), 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/QZNJV2515248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf420ae18ef566f239a25c42c34822cd2de09994e34086b06e6092dde07efdacd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNJW2562712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf685b4f14ea98bce0b90094c59e76f4f6891e4f0d7b61fb632186636be9773f3. 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/QZTPX2594195.