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 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 0xdd3bd2f310efaef5f5c73e15a74f88001d9a6c54c4ad07329c80e78caf8f9f37. 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/380c1ae9-832c-47d6-9189-1caabbd93791.json and https://artists.proofprofile.net/proofs/artist/380c1ae9-832c-47d6-9189-1caabbd93791.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 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 0xfba80b0ddb3076698098145601bbd453c59197891448a6ad921fbd1526d7c033. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMFMF1548629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bafb5241fd85cbada374ecaf66fcf2efdd37ca9606fed97069f29486024709. 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/QMFMF1548630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065c8232555862aacdc4f2c952da4bf818ece897d552025b7a7b81b38b544e34. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T17:01:24Z), 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/QMFMF1548631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778ea6d864193ef3254bab9fb546cc9478ac50db3d70e70d2d3879a37ae34347. 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/QMFMF1548633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12539cf9007eee638446cdcd634da29b3107b0b2d65c2c521a75d2f56bb45283. 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/QMFMF1548636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f34ebac3587f3bf5833ec5035230fdde4e39e812c0eaaed4162c3457fd834a. 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/GBK6Y2220101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8801093e51abd8a70f67d92616b4acc14d19a76a5f5b11e2409974e3368a057. 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/GBK6Y2220102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650819e7fd4329c6ee103fd82165012017105347ba8fdc885cb7bc07021ace19. 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/GBK6Y2220103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c85339347fec17db2ec7708eb27d22ea3c4140144ea6f8f59291e4a80df01a. 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/GBK6Y2220104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977518c03d07b257fb8ef165d1a1dd8cdd44e84e6b38e2079baa700a5ea595e7. 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/ARYQE2135359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf383a3a46af3791545afe7ec176df672e701501c2ae2ef60dfd1266e0e006dd. 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/QZGLM2133338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2313aa05c5f690f4d993a5ba1e82bdb4cd3e63134eb067bc1568fea65d8fe267. 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/ARYQE2235357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb855a91e17000cd3b94855e57b4ea9bdb631df9e66388056020d09569016b8a. 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/QZMZ92132344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec7d42fa6e793657e14dec76bf099ea360224def41b6e5a142bd129edd82649. 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/ARYQE2135366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0063adc8129f6a424592401207fa2d950b7d2a7025edcd8c0d7faed5e738d81f. 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/ARYQE2049028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b0c902912d9aa5bec562f24e92c50e432af368b6e4d4805b6ee8d7f214bccb. 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/ARYQE1901270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48eb318a860833e6649e373cbc8aaff8f27b6742e89edf86872cd6568cedec1d. 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/ARYQE1801024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc099edb2a3498a07a8553ec34761ac37ff455b8c14d23947b5b9981005769fc. 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/TCADD1715646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff0f749cbd5091d595b13f35705cf9581b385c23ad4001c5aa27e6b82dc3d7a. 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/AR9DS1635352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546d4e4f0e4df61fe0b2127204bbfd82d8354409775bff26c6ce423ad20d6a46. 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/ARYQE1675350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425c47414aaf541de7264ac4a993909efab1ec9785a303dbf7a2e3315674f22f. 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/ARG991020048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336f0f8ddd821ec7754184c72cb2c41f918fe15f6344cd99facca6485e5a21d2. 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/ARYQE1535350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d9ebb07323993138af7f0b88c297c124e36e5730858124c108ab141cfa0ca7. 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/FRX991547578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac72036171a49de8b647b742e4ffca9c4f285c302c1ab84154ecba235b114efe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARYQE1335351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2990f710dd89f07ad6d33065ad15e4a4b2825bfd4e08e53b3ad387de5db26d17. 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/ARYQE1435352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee74e45332400f9a82517bf7c4d562b40b27b7f51e02743c8fd2c719672e65b. 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/ARYQE1435360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b228b9662346043c7dc402aa7910c7fcaaca56356c8910caa0e5308ded0393. 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/ARYQE1435359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c21c23c39f0ef6f1de006c466cf04023e58cf25936c332db9ccd1584202f6f5. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:09:03Z), 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/ARA821400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810b3ab5ff93f50ec9c5a6391ba5edd9e6462dc60587b0f01ea0a877448f0736. 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/ARYQE1322812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08dcd9231a8915699079a5b1efdccd8b00fdfd0303b5bdd817b1cf389aef728. 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/ARYQE1335350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42819c4ed996c1e4cc288a0ddce63553473055ff06f3b07151bc6e380fae9413. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARYQE2475353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58bddf762b43a177cb9e0091bd779230f0cd5c40b6e57ebe8a258158522f5f1. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:50:53Z), 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/ARG991020176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71d0497fd72bc2d7e10c72e6f0f305c9a706c49d0ab0163a6d66a3e48047cb5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARG991020187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40ed51b8941e2e3156126d40cdcb1c3ff623a2fc0ee01e9d7c13f65f130d2a7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMZ92063581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3338067a62ae51352f42d93aa8310140a91015a32d33d9450ebe7f54f2d461e. 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/QM3DF2260966.