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 0x2c3f5676d1d3e90f0787c2e1a4f319de8fef33a5e14464160771d355b8918cc6. 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/f5bd70f4-bef8-4958-802f-464a3b47713d.json and https://artists.proofprofile.net/proofs/artist/f5bd70f4-bef8-4958-802f-464a3b47713d.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 0x5780a5f4c60712a8a79c1debe6187a6ba620c28d9edce92d921992ac1fa6babb. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/USL4Q1987401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58eba370924623bcfd8532ea921a5d382ae578ecfb4ed638c101f00193ffe5d5. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/USL4Q1987402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754c9c3fd372a018afb250d8e2010e47c8ecfc5431a84425459dc0dcd3b1fbe6. 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/USCGH2041568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6ea4ade254c8a21c10dd9b74692c4e2e558364bdfae287c0ea0e8f65a5e583. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USCGH2041569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c4940a07479489e7bf56da4cd105cdd800f49d30b710f1f75dd258f10227ce. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USDY42033430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1d33406be0f115ab21c6ca737ffd7f5033d67c6a6eb477be14960d0ce4ed24. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/USDY42033433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7397818a13af278215abbb62dbcbd88d03a0f4eb7ceb14ef52e31dcdecae6447. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USDY42033434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb66ced142de7b78f423d7727ec381fd963b5506a7e1998215f21a0ffce6950. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USDY42033436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c8a59b65440366c52a6f4f73952bfdc115403a17069e0a1882447056aa50be. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USDY42033437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfee712ce2f93c879e3d870724d574b39606aa014a0d9bd3c4a98af4e16eab53. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USDY42033438.
Relaxing Cat Music: The Ultimate Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e787c70ae656402b2316e790445283923bdda6583f3a0cc73977bb08572929e. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/USCGJ2149768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e74405b6b08efb3cf6774fbb7e3e093d312a992934e0101374355403b4ffd3c. 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/USCGJ2149775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d6ba37f86fccbb28c1b903f86e6949c6047a0ede732430b0066bf6ad5e373c. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/USCGJ2149778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925fa1ea916b7e5ed0119478fa95c6170503b30d48b17c9c5526195649c1629c. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/USCGJ2149780.
Twinkle, Twinkle, Little Star (Cat Music Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de69d1d4aab2707cef131c8b4861e34a258a7318bb8d05b649a8106ddb05cd2. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/USCGJ2149781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c48b893ba2a01073a66b5a6af2ea727bdf87e473a3b9a78aa75315e2fc37f3a. 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/USCGJ2149782.
Soothing Music for Cats & Kittens, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64622b20caa89ac0a26e71e0798c79fa39183bd36a40ebccffecfaea5faaa93. 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/USCGH2213202.
Soothing Music for Cats & Kittens, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d37b3548eb5f41cf3adfd9df25bc992272784d21d2f4689318959097e1cbcb. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/USHM22207517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fc6629be2f71b5d4e886964f1e3cc8f8101aff1f0f78d503a460935fe97ffa. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USHM22207520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7b239bedb63ffb815fbec4b76677bd578f4f3de715fe92a5047d75624584aa. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USHM22207521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadeaff6c27f6b452b23ce46b38ceb0baf6e318bbf4023bde00dcccbbacab6dd5. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USMH92392812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa312eeb89218ae48f4543291a88cdb084f98798bf4f5dadea25a4c0acb44447c. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/USMH92392813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b2e94f638d6dcbcc261b401a1e910dc65a2e69da9ef094d1c5f68e1d2e278c. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/USMH92392814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4af478f6dd713e14e61d48f8e1da18a39d4ea92ef9f5962b29b435926ae7b9. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USMH92392815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ac1aefac6aa3a53cef411e2b568682c7868c418f4947b718a93f0a023eb775. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/USMH92392816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111bb1d4a21f963e364e9b3e23dfb964665a8b836fb3bf761893cc485f4281c5. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/USMH92392817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c9620365116cccde7bd75131158e7b7ece648dad7b32e026c10afe565df22c. 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/USMH92392818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4252135141902f89b223bf9214792cb563ac16fffe95fe36ca28745c3cdf5fe7. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/USMH92392819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1150b283e30ec6d819a1e2c9456d1dbb269f39585a85a70e09a8ba5f64c9a5. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USMH92392820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4ade5dadea533fe696b68a7916a43207d3d88d167eac973d3b7f4bf04502d2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USMH92392821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bc5f2ba16ffab2fef26b9f0b86227b6799ac7dcf1bd920e1ad2ea466460f93. 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/USCGH2550219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efb1835a81971741735690fd4c6780cc67bcb35650196956897a93fcef86858. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USCGH2550222.