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 0xa98dc376a349c2c623feb3d334e65127a2d6edd58041cf9162226402d2ef48ba. 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/9e274979-4823-497b-bca4-27626bb37049.json and https://artists.proofprofile.net/proofs/artist/9e274979-4823-497b-bca4-27626bb37049.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 0x4df55c022898b60f64c9deb5c6c55608df4336c3c0f17f46c393bb58c9600dcd. 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/QZWFL2300922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58ccac27ee1a232e5db76b4adb40875f8b8b87f22c519d6c2b38207b3b9142d. 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/QZZ7X2438054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4350ab4b49605a0bf74c3af8d6d820f7cdba775f48b969a6ffea292cca95de6a. 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/QZZ7X2438055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdf2f67b8b95725387925f76b64a9ca591048b6a248ecda961f34951a92795b. 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/QZZ7X2438056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d41cb00add49f164e2faac3b900161822779198a0bdb8415622450f77223b7. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZZ7X2438057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c9e71aed53372576712cb8522e68933c5a996e85784776d84443e46bc52008. 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/QZZ7R2445766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4464e87f83b5cc12449db1be831cb17ade7d148d39ce7e52eef4b54be44899. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZZ7X2438058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46867f2245e5c1134e5ddbc51404d287c96642907001ef3ce438b51bda3cd64a. 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/QZZ7X2438059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e4db88e68c10f6d0a3e94959d3eb29d9b5f57e05a7bbf24235fe94fd2c13c7. 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/QZZ7X2438060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d37bb7e721f4f07909f0f975e99701ccaa72af5ff01c4ed4e83f2776739a7bc. 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/QZZ7X2438061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f5b33c1eefa213d77cabb64f99af28f104fec22040315086106998075103f9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZZ7X2438062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452fc09c7c8b6c8beb0844d221c9799406a8f7ec21a1ee46de9d59d158982e6e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZZ7X2438063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b407cdf22460947746c97ca09a6310624dadf2afedcb546ebcf9eb6afbbf26. 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/QZZ7X2438064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2381da273e6427efe9dc10f5f6f5f0b93d7abdcf7436d274aafc64c07d2775. 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/QZTPX2467131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19a5d1eadfb19914159650cb3bfe47615f139d42552c429e3ce41cffc87cfae. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZTAS2450567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4783adf2a72a0e6f42e7759085d48390c86e266a7ab32d3de5f67fa91519581. 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/QZZ7X2438065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bffa2c646513925a02b424681798ae980572ac00838099278f9f397c3e9602e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ7X2438066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670174bf4846740de0fb95c222bf82d8225fa49a378495111d86e49c9ea261cc. 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/QZZ7X2438067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71a90335304c0fe515780915c6edc5992280900eee00232cb5d5796c476ef63. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZZ7X2438069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b9b001eea7f02601553deef7d7ea37be0cd539fad7409fd8c8aa596df5cd30. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZZ7X2438071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c9ac103c62fdc968bded36b9a95f26a1bd60c74e6ed7ef8b63619087407a09. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZZ7X2438072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ba0620c2550064c6c2375c62fdca813831097758f2354fb63f3ab30fc999ba. 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/QZZ7X2438073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512dd6b6a61195a52094bba86720e2862d077184fd9fe07ef7f086471c0b4f42. 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/QZZ7X2438074.