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 0xbd790f2e470d57aa2eb528d6b925a6b9cb2fc55e7c9c4f594eb52b1dd5f8b8ba. 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/0d9548a9-fa07-4c6c-9e2e-9e775320bdc1.json and https://artists.proofprofile.net/proofs/artist/0d9548a9-fa07-4c6c-9e2e-9e775320bdc1.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 0xf7c961c6d3356060ec5f30709e41fc48df5962e9430168bc6b30c4230524acd2. 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/NLRD51630321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5470b01cb90669c7eaa9e0dc6edbafde60cb428998f4403616b12b277406c3b. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/NLRD51632043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952b8f9e9e29b85b7c7bb72ec65d607c0b9e21b0cf6fa1169d28a574c64b6fb6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES91888591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ef63f3865b0485a104848cfa4b2ae843f7b8c6a3cfceea661961e72cebc3b8. 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/QZDA51992905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b14879b5f49492487d80952cf8b44e59bd9afed04db120c46d35611b933951. 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/QZHN81933843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf22750458d50769e823bb40198f7b9527478f50282a924a3f24aacddd817954. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZKDK1916777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15e753b6cd9cadfdf1a2e635124615045f5bc50ecfe830b9247d514d9fb232b. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/NL3AA2350010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d4b1bf3c1b1b2a2ab7a113b9aed4811c2f33e6ade2929b767b20f82ae61d53. 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/QZPLR2460868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ac7f6640050a79f6c113bf1bdbc7783f05b11798c05b4d59d373ef608b6292. 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/QZPLR2460873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dd5226ac466260995d5590831f0c4c0f2aeb47518debabcf2fa99845b384f0. 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/QZK6Q2517859.
staring at the sea without you next to me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a309bdd55ce765e486ebbdbd30ed068558110ba294bb040fd211a28868e6c2f. 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/NLRD51632503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593e5fbe8eb11afedf1426e0cda43acffe2e12338cd0a8228e67ea33771ec55d. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/NLRD51632801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47858ca0fc80a9edd7b51cc991511151162f8b97c99e45b05d6efbc569b39a9b. 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/NLRD51632074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ab7573bc84959d17ddd5da8d6db782176f64e43f5b46431060b6c3547258fc. 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/NLRD51632087.