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 0x11d6069baac0e9a6ca789c89e94c07e6333caa11ce298c6350e2d1208d77d930. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/463c7033-c0d9-4a42-aa47-d719a70261fb.json and https://artists.proofprofile.net/proofs/artist/463c7033-c0d9-4a42-aa47-d719a70261fb.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 0xeb878a4eaa4c96d9ca90bf4601fd3cf25742ce217a5d5f85dcd24273a40e8afb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USBRL0300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6a6971747ac059ca37bed2ef5d109cdb7b33aaab7d0042aabae975b5c32b3f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USBRL0300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18711f67179bfc0ab479cdd07fa6ccddf25e93f02a47fb8a8bb924a9e2893e2c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/US2U60404302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13f5cf874d4078ecfe56aa829513655120427d7de5ef032dc7c0a5a4e1ceb8b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/US2U60404304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df34a4bfbb88b6a8e04d156d2c440bccc2343c35430ebf09210e974364bbea8. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/US2U60406402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0228b69b7c8793f1e96b5faf60956e67fff6a38ec68b9fdd590f439404e743df. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:14:07Z), 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/US2U60406403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880e7aecb496196fa6f47a2930397ee0e2ff4239849b55e6991376717ee49ec2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US2U60406404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcead2b5d10955e969eff3b2a669ffa6e675f0187473dd7890d697ec5e8bd5523. 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/US2U60406406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92ea651b26ef138c97c549c8aed9a4759c780a485f51e07fc7df6b73eeec800. 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/US2U60406407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7520a8bd209114cecacc6634424b797944bc6b5a042e3707b3cfc9ace5b865e. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/US2U60406408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef390c7bebb5d50e8c18c2f2c619e487da6646cf092deabf853681dbc1ad1bb. 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/US2U60406410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835877162be358efb0d0fe3f60f3a6ace41bfa10d17f334b87065703e70ffde3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US2U60406411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb435c20f2847166d895658ab6562b96ef5ad9e14031679a701606f31c9173d6b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US2U60710801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfc90281bf7dba5180e5915e9af3e0caeb7747788c99099876e0d7618c4346c. 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/US2U60710802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279516e8f9560705a2be0edfdbde76ccd4cca6252554244ad8e139f5467c3b3f. 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/US2U60710805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624d8112880c036a816727c8f00ccca809f7fcf49a012206ba931c753e1832b9. 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/US2U60710806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959a56d11881fbb05d512112b3ebff7ee02f72d138d673d4514fd8e55d2e0378. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/US2U60710808.