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 0x1806ef15b368135955088fd0e64db1b3019ddfabe348af03f96ca4eb40709b13. 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/dede1c0d-beb1-4a63-8e14-44d1538cd65c.json and https://artists.proofprofile.net/proofs/artist/dede1c0d-beb1-4a63-8e14-44d1538cd65c.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 0xbc212c17a134ccd26805e4d5b1263112b2da32a907645bf572ba6ef20664fd84. 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/NZWA18400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e88300162dea712674a540a966243c9c280de5b28fd5f95e0751caab967e3e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NZWA18400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda91edec92ff35773d290078b259dca5e3cde348bc3fbd8489745b8e974ee046. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NZWA18400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deaeca142e00645785962b2d4fa0fad2e9fc2c528890855c17dc718ac1853b8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NZWA18400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1762d73a1e8abc2663cdafb184d3b4f27760c97afaac5d9f6e7fb987aa196743. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NZWA18400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f822662b67b48d211109f08fe7f82b8fa6b406b85d5513ed5e847a35caea60. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NZWA18400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940462e6b16082cf98f3ac057ee546dc19991996c5e475ae55963a3433eb6aa0. 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/NZWA18400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc249554022374f5121170fc3794558874ce8817791b6703fecb53db36f5d8ab8. 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/NZWA18400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad7ca48a88f3561d14dd5a2528b1a4d54b78b4b68500c7d249ec48bbd373ffd. 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/NZWA18400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a772e807bd2bb6205a111b825416a4d1a4cc342ab5b6f93118615f970578c25. 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/NZWA18200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3191774d485944472395188848cd06939d1586294682c076760ada6558ff4f0c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:36:11Z), 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/NZWA19000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4a5921e7ebdeeee10daf35832b63d9c03c43f188c0456cc120508d917d4ea1. 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/NZWA19000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e19d3d2d566c2f1776034e44c1fcb1bb7d962cc849c5d427cfda3086639da2b. 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/NZWA10800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f55d22ba926acdb7e1e03cf2e238d76a83beadff07f40f9af67c0181badce84. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NZWA10800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0781d4218ecbdf585d7f1d79d35ebea894c5f4e93e9141006f270ed761e295f. 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/NZWA18700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660b2c03dc227a5061999fd60d04899edd0eb64005cd48f397827c7a9e8c8ca5. 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/NZWA10800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3d7a2fddc2231a66669bcb7fb7f872713ee2b3a6ef57d3fe488a917b63ab9c. 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/NZWA10800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a582e0a4d3e8af24bb472ddd1c9ca83f8bddfc28f694c7ef160dcb130b92bf. 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/NZWA10800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02549a974a9618a1577122d7b8f0aadca728e47b1c209e780b25b8e56abbf79b. 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/NZWA18700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c132aba4c9038a9626504d613865894522f6cf64c151fbd691becdad0a38750. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NZWA10800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d096d22779f9b49d2d2cc1da689e033b84b5bd5ab0dd525ca7b76674bf7680f. 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/NZWA10800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74abe6f06df6d184a8ff529d3aed14738fceb4384813dddeb3ebc44045ca535. 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/NZWA10800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fc8dd9b09c6a6f4d5303a551b73f5037f3ed8a3738e27136f884476a7e3a5e. 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/NZWA18700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc43c593771e6c4189ca0be9b42321a762482d27484664e00ea1c233824f125. 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/NZWA18100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb85072a0125b185bfa2e9f51d2dca7151185864ad0ef73d6da1f4f58f7946f. 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/NZWA18100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2126aa7a7b6f654afd010ffc1589586fd641faa607d5ce509744156609cbc69. 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/NZWA18100001.