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 0x8864d17f5ae267fa525cf1d82736eaf2d747566f0d7c2b594bec7e464f48352a. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/937053ee-e18e-4458-8ec7-f3aee70da776.json and https://artists.proofprofile.net/proofs/artist/937053ee-e18e-4458-8ec7-f3aee70da776.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 0xf4e8fb6ac7225e752726823d41c4729e1ebdb58684126a50eddc19c858561981. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZPLR2503384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12dbb0fc872e6ee223e1b1588ee686f069ba4e66843e1f2a9c21aa9662ec816. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZPLR2503391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83450b9315ee6f80a9bd0f8146f781961039a5f32bb233c6c7a6034bfc7ebd2e. 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/QZPLR2503393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e30b3e403148c9e32418cfeba40e07e706aa9fbf08c8d7bce6caa66bb92ac6c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEZC62138147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d1ee438dee6fe601f6e2ea6687328282eea5a354bdfb4a7ab1f63511b96a34. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEZC62138148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9df51d76a3d4cd5fd9dffea4896072532b9976fae466bf0e7fa119b4e3084a. 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/DEZC62138149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81676ce9608667610f311fadb443d306d57fcb82ef5d435cbd6463516be46532. 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/DEAR42269074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6f069154638fb15e6492dc7bf989da9384678d0d7e0ca6691c79ee2a2e531f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEAR42232486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837575336dba3e51a01acbcf04549546abb634c4ef5fd8fdd8941f34d2a64aaa. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DEAR42392637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cbf54e6f9773fc7d2db8ee3a4f51462650d52e32422bffcae6eb2b2b31f9b3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEAR42589105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1b35826b38fee13d5191fde0be772ff917b71264df28b60ff3f9add2daff04. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEAR42580784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34b6756cf9a2092749b3d3c798a9a28f1cf407ac364fcf09e93f07c35c3caf6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEAR42568927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2d6899c7758507dcce3f75df6b3d4299dff53d63fa5025516ee45c0c27f7d2. 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/DEAR42554243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3192bfdce875e9ac0671c5a69c3aaf5b6a9111f49049fc709e615d07ed52abf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZMEP2526117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6028eb49db059c0afedf4f79cdb616c1a2f5145ec1e64f4c66fb82acb442ba0d. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZMEQ2547690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490802f0a3681b9b85a3426a9539e3b8c7d642fcef50d6509ba9fcd7533aadbe. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWW2523918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4b8010acee8984642b1f7d9657a33f53008c3c32a38195073282d7600bec92. 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/QZNWZ2572699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b570fb5d1897dd6b5030c21680193a2720d172567166f80d6186396685eaba. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZPLS2571266.
Midnight on the Bridge (Jazz Chill Sax Ballad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d133f893036f335f0aaadc4947e8bd6cd34457d67bce2620c2df825069e0283. 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/QZTB32546534.
Split the Sea (Tropical House Relax Saxophone Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603011eedc4c2fdd32e2d8447410af9c75abc4af85270b93d8f8180b425b6816. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZTB42584229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6098d372d88467f01fcf87b07ee21fc6730bdcba6bb0b9ca090fd2429da5690a. 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/QZWFH2537047.
Tropical Nocturne (Lo-Fi Sax Bossa Tape)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c8e96e2593d3fbb430fabd32fe116008ee998c8f6aeeb4876918847647b6cc. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFR2510615.
Last Night Conversations (Smooth Jazz Chill)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e79bf5a7d8393da837552a8aa6107812f036da4a1f67bd9030b579ea379cc1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ782509786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4382eacb9e8fb1c2bfcc3e121b2d6f2b20e964f56d5f8dd3eea25b6165d4aa6b. 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/QZZ7L2563575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c11181e4bced33a4acfa982cd5e29682bf17034cf591c00a88e250de4c71982. 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/QZZ7P2542243.
Leaving the Bay (Sax Chill Holiday Vibes)
Palmfish of Stari Grad (Ambient, Dreamy, Cinematic Sax)