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 0x29d22a2dfeade1c8c5ffda666dcf6c6ad4cf58af047fe6fb048ceb3600fa9388. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd92ffee-98f0-446d-af3e-d0c0fe033833.json and https://artists.proofprofile.net/proofs/artist/fd92ffee-98f0-446d-af3e-d0c0fe033833.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ski Three - Music from the Cape Guy Game
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 0x0f8c1552c667240b273478879bdd4cc9c01b69387d43910a4ca8c85c3498ef0e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/IELOI2014187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ffcfa30e6f74c85bfec8e51f7290b4dde40581c6aa7d529960d70faf9885c7. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/IELOI2014195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fee5d3570008feb2c17320532990a6dfc7318a10801bc648479b9b1acc2405. 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/IELOI2014200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b277f255a87b241fe8eaa0983c6a2edc334e62cfed903d9f9454b7267cf9e5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/IELOI2014198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877bdc6f19d0bc3b430991a5cc40d23b8db6c43fe851c4494d9399e57d7912f9. 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/IELOI2014189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd29497f9c9787ff8c424648cf814e14a29631f156c128b6c775df131434286. 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/IELOI2014196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138fde36dde6fe4e0f9a96916789fa6f1a6cb20578ce96f554cf223c42ef6ff0. 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/IELOI2014197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c87df790399243d5e07bbb83e285faaeb8c176fdef7eefbc95984ce9ed86553. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/IELOI2014209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc60a0b44e576e30bf0d7ab75d1890975370da946679fdb11dbc32a4f47a38cb. 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/IELOI2014192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0ac5222e9418d00ab0198a7c1da1e850c795a727a987503ff5a7114ae5faf5. 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/IELOI2014191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1d82dd16e0d4fb6130f6af9a8f4f74021ed3dba346fcaa004d611e5e569d44. 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/IELOI2014211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa746081f2f955fc1aced91a62f1faaac33d2d2d3c5658be2250f0b624171ce48. 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/IELOI2014190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43177f67a2def8cd933baf4043625cc6d79d65355f0ed010f53eb18955e9e85. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/IELOI2014199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb101dc60c210201995b906c05efc3c89a74b23c1a70ab3c7358fcb0970d05288. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/IELOI2014185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225da3f877757523564efdb361f3479ba453464ae84e0d8851e1c2ed649853a1. 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/IELOI2014193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4148379917dd3d4bddabb88e840d53d6d6592317cf7359a9aa30bc6f5d345a53. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/IELOI2014194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e431416904c5aecd65ed4d09902fa4001e01df14d594b32af5511da93e76ae1. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/IELOI2014210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16deaca243e1c3a06b0f4db913e39047a30979e2321453387efd007ee5b9d940. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/IELOI2014188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffae0f96d5f2f5e7af4bb6108fa959d173cc752f84a843cbd9cfbd219f30fda9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/IEWNY2321152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9ffb509fdab4c397abe00036f94ca58936e174c9df9dc0d6b569d52367290c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/IEWNY2321153.
Mask of The Rose - Original Game Soundtrack