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 0x8cc83aa7c57e1f630c2cd7f99ccdcb7ac9d0492b8ea0efaaf5a7d52866619ccb. 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/b0cdc490-a593-4c60-ab72-0c8fb614af24.json and https://artists.proofprofile.net/proofs/artist/b0cdc490-a593-4c60-ab72-0c8fb614af24.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 0x6fdc72d60328f207af9e2b0ca029e49ce1e96864057e1e3f5357758c325eaa1d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GBP4E1700340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68abc50da6c1c0db908562ef01d811b2e0c0de100671568d2a735faca1cdfcc. 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/GBKQU2030408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cbcaded7ffceff921b77a64ea2ddef613e091fbea5b5422551791027a9ea63. 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/GBKQU2201041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c25195718436e6bbc5ad45cd678cd497b2906138e81844ae0e85ec8cec405a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBKQU2201037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf652afedbac4a2f81b91643b79fb2203350f102507e11e59050f14e1a962995. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBKQU2201038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5ed90622c20a1d897171585df5e870d7a47211f9ae17c34c4ba57152bedc20. 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/GBKQU2201039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18337ad2b0a54b31184bf942776d2088fecf2db66cec7bc91011a4acd9b7f5c6. 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/GBKQU2201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cbcaded7ffceff921b77a64ea2ddef613e091fbea5b5422551791027a9ea63. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKQU2201041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5244e1f6ea8ca2a66f281cdb9beccca8022b75239c536898dced5089f665eb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBKQU2201044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dbf782dd188900e32a9a3a6f865e6419a73b25b882b3e71769f353c34d993f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:31:44Z), 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/GB8KE2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55cd48f023d001676f4f9f9e6bfb2376fcebdb87c081a7bc62c05b1ce437213. 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/CA5KR2325399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebbfdf8a4096aefc8a5e953be798d6c0b9e59dd76db93efe139711be2a754a8. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:44:59Z), 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/UKEWB1600395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31420cd79933f3bcd25d09f7b2e875fce85b99c4a6f00ba12ae9ce850b94c5a3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:41Z), 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/UKEWB1600394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f83009ea99d0bd9ed7de6c31b2ed34348cff058195d0322bd41580eb932f5a1. 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/USZXT2455413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf8ce1c352142489dc000f9770b6721a17ea47d06b46664d7c3a46d295c8894. 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/USZXT2455414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf478cde3bbd21c0ed53e264ea7b89233163c4449b449e1382f51e7fe314c37. 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/USZXT2455415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c528643eda11022aab12aa5f73cc7f7c82ddf8c71163ceb105782423d4b9f5. 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/USZXT2455416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852ae773b2bda6435d1ef1f1140c02cf3d4cf5cbe23d00d9d8f1d8eb811917c3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QMDA72441559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8053951621e1de2348ed3fb8110d7b60ba0a76571af5e3fbd714042be76be983. 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/UKEWB1600396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b25791ea67d987ed40118a0fc74f34d2264d0b78897b2242bb529d6a7e1513. 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/USA2P1700371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ee8ff70f1ca22e66c1fc8d3f188ebaa67488d3438997d1ce381953ace198fc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKCTU2205202.
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 0x2fdf71a12a9f0e9cf2814f7f30ff0d609c6ea8eaab48b36f90e4d7de3b43f605. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6N22422093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48238cb4a811785774eb89b34cf65b7732eda395aae5a8e04b7bd9423be00364. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZN882205179.