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 0x36373e97f525156efa38d525a75d94be88ba1a21221229150e4c91af533dbc39. 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/ee3ee1ab-d347-4695-94e6-007d0fd31d3a.json and https://artists.proofprofile.net/proofs/artist/ee3ee1ab-d347-4695-94e6-007d0fd31d3a.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 0x5f13b28ae24431a4803bc23637ac6aff088a33212c245ccc319a6a453c1b21c5. 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/BXYA62300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a10ac965a8c56cb765eccb7e8e48ff02592d16b98b717162e44a09877b96ffb. 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/BX2972200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bac72c11966df476463b2c65835ffe8c84d21d10c6c584a63bc9cd2ec405e9e. 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/BKEZ92400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bac72c11966df476463b2c65835ffe8c84d21d10c6c584a63bc9cd2ec405e9e. 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/BKEZ92400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd682b2a4cf4583f532fa9d06f379b5b05131dad0a24550530f60cee73c2c85dc. 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/QZNJX2457801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ef5bf5bdf7db0648340eeff2d810568c227707b4a8127a49c13bda899a8ca8. 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/BXYA62400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867dcd17263f4205ef324a6bf61fc87b3b1927fc3f3a28f8a71159da15fc9abd. 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/BXYA62400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c3d06830c65ea13ded753de38a2e74d508f7581a23c442e111c5a2db8e6392. 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/BXYA62400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866f3c507d35099b95b0a695e4266076fe96b79124a15179683c5520ead8bfac. 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/BXYA62400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2fa515369597f1bf9cfee9211ddd2cb9f41dd6de67b0ab406ce6b330e67ae0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BXYA62400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5ec738cdcbade431871ee7ee94e3135cfc07d151ab0a12e4dc4b4229806ca8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:39:14Z), 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/BXYA62400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d874af2cf75e261558f2de4a8d92f5950402222c2431cbe9cffa415bc48409. 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/BXYA62400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831cb660dbffb9726ad6b3736663fe9e14854c2cd7d667317857b422805f4bd5. 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/BXYA62400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a83fb99f28a7d2d742acdfac3d0a6253433eaadcc6dc5a97c653ffd5d10033. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QZNMY2388532.
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 0x0532f29f604bbd22f2e6cd6a15e4f1a30b48d802b74fed53e3e5b796d3192d49. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZMZ92401499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1928e2c45945e69297f38cb1d3096383d94cb5f1753c14a3089d90f97631973e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BX7D42400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4cc3ce7cb609bd60c94283aee21e5f58f06062f07b15a076ae09684df9457f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BXYA62400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591e15877aa58ebf98ad66ba7b7f6824a997c46f553650c8bb35664d16c03133. 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/BXYA62400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb257812882e030603831a3dcd72b7cf3973acf89d0fe4be19c7f9dad38d6e0. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BXYA62400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16239789c95d7caa06a603dd94b39e3d3fb49f6a40a63cd8fec1fe693f1c1dca. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/BXYA62300001.