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 0x6f78ee7885b8c19efbbb342349958b51ef565ff62e423e7f556ea2a30c79e431. 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/1feabb27-c34e-4edd-947b-542bd8f7ba37.json and https://artists.proofprofile.net/proofs/artist/1feabb27-c34e-4edd-947b-542bd8f7ba37.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 0x0990afc4ff928772356aa6dc29e5d92f3bddca458a82e5f2b134a6d937e053e4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/AUBEC2316587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f2acab817da10072b0a4454920d2910b3e05047aa4373e730d62a475402a4c. 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/AUBEC2316588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc736632500c05e113d1c35d31f449395102f15426a75129042947f7e5981dcd9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AUBEC2316589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2c5f422b90aeacd498e46fb603e92bfb655432707e93906a4a8cd44735571c. 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/AUBEC2316590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028dcaa1c1699124a0578a065b510c18f6e9d5fefe18a3e58ed46561d8f5d182. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUBEC2316592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37741ef09f0809e1176678770763424faa055aaf5b2d837a73c8c02ab4c0e81. 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/AUBEC2316593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf85a255a0fe5c51f67c269b26219723576df70fedfbf92941d065834c558c38. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AUBEC2316598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39710b39932e562394097cce6fa649094502d6c75c93fe7ac0ec81bfd42a441f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AUBEC2316601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596a840dc2e4ea9ef203d9686ca54d781f44a8517564861f9d2924ef9fc78a3f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:05:17Z), 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/AUBEC2316603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef53a5753600813a91d5abc20848e2a8e80e7a237c21a030c82a1e4d6491098. 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/AUBEC2316608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737dc8c2d31d7802eb90da634c699241561598846bec641b9b1088d044c52f80. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUBEC2316611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278a01a4a60c874ab0034232bb386bc7ec5a4a417c2ef5613bf6cd82fcf3c4a3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUBEC2316615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6d13e08097733819484742e3e183ad27826227e11f9fd372d0a2818708ff0e. 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/AUBEC2316619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421ea5b398ef1992f8864c87e54bafdc03da986c9ee7a12341a0178a0cfb9d22. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/AUBEC2316630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8177d062602b57b89d96e6446d94f3c850ebf5a8da68b9506b138a35ea07d0dc. 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/AUBEC2316632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf77899a05e0a585ca27a1a632c3ab08136293fd14ebcd2f834b7ad4bd5381f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/AUBEC2316633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14abf0338c89515f9d2bcc2d423f4fa5aa9dfe0c927cbcbba7d21a4e2c0c923b. 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/AUBEC2316639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12f8ff363164fb1e5d93143fc26f9064ec6958e9e8d196b05a418ce7cad7aeb. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/AUBEC2331985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05aace04d58761e877f2b7574d02250702614f39c1e43ffff999540ab561e8f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUBEC2331987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1add9679c6b93d81ac77d416261a5cebd41714ec09e0cd95724b36a46a96be. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:44:02Z), 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/AUBEC2331988.