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 0x56a783346724d8b15a95be72e4bd260bf9fc6f892b90c8990887e31972f6c7ae. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/076c7c40-0144-4c51-9ed6-26f4ec562331.json and https://artists.proofprofile.net/proofs/artist/076c7c40-0144-4c51-9ed6-26f4ec562331.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 0x19f4e47291bed4d44266333b9fac9b071fcb38c686a5d73ba50ba453c0a49110. 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/QZTAT2327338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fcce313ad6a5ad094ed5c5d5e8bf5a7a1d485d7ec1efb36cf37ff0adb59bd7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTBE2307265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a1f119778120b73a220009051c3874691e7a025ed2b48f7312b435f6cdceef. 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/QZWFR2382281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c4124ab1f0e528902cb1147f146bcdd803afa01321579d5939bbd44dd8a1a3. 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/QZDA62432242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b09833252bbe07b2836967a5cf4b2ad9ea620806d6cdcda036af07fa8d553e1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN82440901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9225baa113aa6bf61e1c576224c6485630f60c10f8e07f62ee9237acdefac685. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZHN82440902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f81e270c40c6623b6bdf6811e5e762e4f70c48697a6452448ce53c2acea62d1. 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/QZHN82440903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08988efb72b143cd6be4612b0fba9127310dd17d4646a89396e689e25628236c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZHN82440904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e538203b1504b870f5e1f9584f337ee73ee2b7f53d6921610384d963d725e45. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZRP42426597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc04edca5157716229d67dc6eab517f22ada9a1c09c78959d9cc552d749ae6c6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFN2473816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccbd4f7434300365a6a4325b03b0750d27785684b0a2c9f0a253637c5927324. 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/QZFZ62598131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9d8f0d2524c85622ffaf076cde4207f16fae09add9b80e8a4e22a7909d0fd0. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QZES52527322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc04edca5157716229d67dc6eab517f22ada9a1c09c78959d9cc552d749ae6c6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZWFN2473816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe059aaf1ac68105452bc4d34c5d63729864bfc4357048da5c3f21da3eef6a199. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZES52527323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3444c411a4416a9044af4008bf077c783e72fbf7ff8db1e27b47d7c7c1408f. 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/QZES52527325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf84dd007f3d60961330ea1b170e7c3ce6961d12d907696105d7799e283cbf0e. 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/QZES52527326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc377530bcb3fef8ecce723aeefe2ed28f2ea9da77580f3c7dc68716c12ee16. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWR2579151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fa226de17999338aea37a7ef00bbf4fa95047784c0838b1220505b6f4e97e1. 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/QZRP42591993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c744d65d542a2fa35718f8e4d3f4433f9b382cbef854f8628a0e6d3a6fac0e2. 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/QZRP42555997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4499219791ff8e55cd6930505d67aedcceb005cbfe22474aa1ab82832e29aa16. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZTBF2507737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd976db72f17d8007d61e6effe9e18cac0cacaa93033a013b62aa89326fd824a9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZWFK2549697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2791c3dc64579cf8abb627fa11295229c2578de26a3f5c01c16527569ab2feac. 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/QZWFL2570705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6619ce35ed2a16d8a0ad3b937113b1418bb823d2d907cb9de5a75604670de8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7N2557447.