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 0x1488440396084e99f24cd59bfefe8346846efcb72571b4030e78be8f5907d29d. 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/88a3c305-2515-45a1-b489-5bffa60413fd.json and https://artists.proofprofile.net/proofs/artist/88a3c305-2515-45a1-b489-5bffa60413fd.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 0x4d2b97a0189162d57fd6134af2ce6a445eaa1a993943a198d33f35414c4e459e. 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/QZMZ92113779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dfda7a05ac37b1711932b8f2d3852dcf8a201834354391f017e634301b8c4f. 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/QM6MZ1708082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928baf97f2f34ad557deb08e1a5fa6196e49493497e0823f4b3c53cff116521d. 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/QMBZ91694132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe541c23846d1120e15d70c04904571dec8198368f29f7c3698f39ec1d8714cf. 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/USXDR1600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b91d2c9f8540dac0ced3d7ad265854de344e93b44130705961d920d6967f92. 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/QZGLM2097858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd126fa5f0d7c96145110631b292b2b93b4aeedd5dab72c1dde0f6889cb63ec6c. 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/QZGLM2097851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c173a9d198da613a8f225d80f781812a50c222b034d7753e15dd53c84773bed. 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/QZGLM2097857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a22110750faa6c3aedb50ed027da1d39f7b1dbae1c20db7222921e02e732ac. 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/QZGLM2097845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc4b9ea496a2b09ca9306018f3f42d9e5a0202c68f2ed9de00cc1465743cd9a. 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/QZGLM2097848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bffa3caeff5c46105dbcb228483dc085edf72104f73aeb4bab246d85da04de. 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/QZGLM2097856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650dc7c365e77149ab21172e8b05966742530737806f76a8af58c166fbbdef68. 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/QZGLM2097850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1691ac533c1d8fbce1bc856a007c8a8ea61af49c0e98f08737809bb028835f7b. 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/QZGLM2097847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7d53a31cf90736dfdb5936222305579d50600e2321cdee7e543d937b122e97. 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/QZGLM2097852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37a9c00cb40c5aa5fb982c53ac17c695890630bb4329fe63958956391b88f6c. 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/QZGLM2097853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0f075a8da60c5405c9cc51f216ce4a44fedcdada2f113a35eaa6628d71fe77. 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/QZGLM2097846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62253416f0482baab7a2b4f74115ad03c1a948eff505af17630deef0431b723f. 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/QZGLM2097849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74783aa09c56dd8cbca192ccc87afaf09e016188755e4d33286315e2c5026365. 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/QZW9K2360140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b752ecb3b0bbc246260184f81bfcf5f366790930964f9c9ece9be297ae9d33a. 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/QZGLM2097855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b50ad3ff45af2fd1592d1e31a328a81d8b596b40430799e076029068a2b070a. 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/QZW9K2360135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7f145a0e1206d6ca815b77a7faaf9153ac6163256f96c0fe46b5d7cb4cd93e. 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/QZGLM2097854.