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 0x6e78d2e93fe9c08370441eeae0137a547fc6fd88f954f22095a08751578500f1. 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/8ac7f137-f9f2-4608-b26b-7b3fc4f92306.json and https://artists.proofprofile.net/proofs/artist/8ac7f137-f9f2-4608-b26b-7b3fc4f92306.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 0xda537ca4d2a481c89e435dfa80d784e2098d970a915004ae963700115840e0bf. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/SMRUS0067635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b49bc85303b2ba43688d08fa61ec4fe014f4a85264c6aded2f6ab775f5211fd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA012100585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29c8dd23c6c63bd30b8b70b1f59fb7a0b6f5bea658d500ef805791da5663f1e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:02:28Z), 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/SMRUS0072220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365267d5ea4ef07f90194a3276489a135b6c2088702f60e02b676f7e23d6d3ed. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/RUA1D2362949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7c4a1a752258ca8dcd108b11ea6694ff3f184a58c972276516b9dd6bc71331. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUA1D2376743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ff88185c9f932962c7d73520ff283839c5d765c503df225f09cfa8681660f1. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:32Z), 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/RUA1D2389947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eab768c444c22e117334348e23e02df671d4048a01ccc22e29780d601d39cf. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/RUAGT2329293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d6ff03aa8bac9bfc6794b77f13a678b3fecd5de78c8be8dba9c927bae0dea6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:10:05Z), 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/RUAGW2300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079e53e95a14153a7eafff2c896d96ee967ece8d6e90dedf5aa2148860b22a6d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/RUAGW2300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8bfb0d58fd0b7dd7b1a72ccf7954abc086c1d08c13f6c393dc17f72499bfc4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:22Z), 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/RUAGW2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42e1cbe1a97519c753667870bf82ef88926dd6300ba285acbb7aba6c5bc4d53. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:04Z), 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/RUA1D2421158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7de426a4d5b7775722418bd7fa82ec8efda01a7f1687ba347185666e630fec. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA1D2478727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333945c6163320ab1f72e88c42f22398e2dffd9d901bf83f559073aecbcd8f7b. 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/RUAGW2400952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4969378abe9f974d4fc5e06fae980732fa34a1cb7ef7a04c69ed484ea0de887c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:52Z), 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/RUAGW2401071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890e6948e9347e5282e80cd06df8a76999aed5443d0ef92942c9418bdc709543. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/RUAGW2401486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2dc224843840e2c30e6b2de78dd3af9afaf046b7ecd386ca30170da0b2b9a7. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/RUAGW2507403.