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 0x56310cb51edb1a6d97204d9539add64469b758e71785912eaff79c1a930cc65d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9c3c2f2-6e29-488c-aaf7-65b5623abc19.json and https://artists.proofprofile.net/proofs/artist/c9c3c2f2-6e29-488c-aaf7-65b5623abc19.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 0x5718e4674cff933e6eac7990d6fc72024c27e9c51e90494d242e44b38a2f6a6e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA42253328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cf71cc172ba55427c9fd00ef86c904be0147062cf667fc94285f6a0374b417. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZDA42253330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689247d1bd91663636abb31a84b17209a4f6fca7cf4976a377b3b7540ecd655a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDA42253331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44615ce704d69ee4fc0a37166cdea0b8be61813ec080f6a65ef93369e67cfdbe. 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/QZDA42253332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdf6ebc0a0bb23e82b8c74e53a7eae5c7e8f66a326e1a459f5cbbd8f1ddf115. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:04:41Z), 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/QZDA42253334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8018833d9431e0bd6086e7f4c80736ad7f29c7dc59c6168f6907df03d30d37. 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/QZDA42253335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51e167dc49ee6874d4c7e4f6a3fd54078f0b2d38c4759550a71784f6f502d92. 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/QZTB62262013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a80571a50bcd73e068cf4645002b21ce9d267b734150be4d2b1922bda7ddc99. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHNA2382703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dbf7e0a4e93d667bdc82f692a7dcc8594904be549f110abe3acd0bfb509dd9. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZHNA2382704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084c615caace525a17fe05c3ea96bd364f9d31bc5d94b98869aa2158520fbfc4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWT2298615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d6a86abe27b339e55d83702a2e2425599cc4220e560295ddcb59d67db9438f. 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/QZHNA2382706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf102634bdb2f4b7d6848d8b673d34cfc2dcef3fb417b1918743b3fe6406cda41. Chain 2 (Bitcoin): anchored in block 957551 (2026-07-11T10:03:47Z), 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/QZES52537058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2ce99690f79fd76de9b87df71807160f7c6a156c824343a8db37b7d5a343ff. 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/QZES52537060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e4dcfe27990aa5a84a0de59e0f72015ceb4d27ad1961e847e3f44d6d343890. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:27:46Z), 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/QZES52537061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7106c5ff0ff64233e2ed0b468d28b9bbf6652b22f48fdf2cb28c6ab366e29. 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/QZES52537062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ec169b2167c96b3f43cd8af5d885b7e1601e5137f5ab6798d18d674fff1789. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZRP52290236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d82d5de7e93dba71ea83ea8983452abf80198d3e66e6a2332c9a124cab45f68. 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/QZHN52333302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd752de0fcf8ab1450f463b1107ca7c53b989683029e720f5cd27828b6dab7579. 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/QM42K2347799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1c32e56f2a3aff44e254be617cd888fb97e4ec6c377bd1a3b4f505df8f7f1c. 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/QZDA62325734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d52563da5fe47d452b741d7e6dedce6721167f7976c224ec990d8eea19c0a0d. 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/QZTAW2482749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf439122e620b9441f8343fc088db76e12406435a12647e074831de44a754dca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB52342618.