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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312fc41051771e47ae2ad33d66fd3a04f7e731fa9b7f30bfdbfa05d6b201212e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3865f59d-6133-4c71-ab8b-c811297f12c9.json and https://artists.proofprofile.net/proofs/artist/3865f59d-6133-4c71-ab8b-c811297f12c9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cca09dce6f2e2e8e7278294532a1f182aa57fd251aa1c5ed48857a8d753724a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH6542066378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd82a1f876aa0f0d3725965b7d87913d1d580141b8fd5b462343324bc5206b8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH6542066379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658199a2a7f9bada05cefc65f387bbc62d8c7883f6a1d369f18b7c6612e7979a. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/CH6542066381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0b410d61e0b1faf968afe02fe92f8d06d77df3488735a28f4c2efda7302d18. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/CH6542066382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d80af1a260402e8cd5564183a07e530b339facc5eaae59a025a6cd24eb8f23. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH6542066383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570f627a7589dcf1a44c29e65926f8657021c6db1e44edd8c3baa00a044508df. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CH6542066384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c10a289f1cdfafbe651d829817cf2fe6c678827843753a0ef458b3ef0a0ac7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH6542066385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337f275778a4bc74776e39d02141c66067685b42a77620358d1e1c6f9c54348d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6542066386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273aa7ebbf67223487aff46330279ae02fcd8b0379cf87dc3a41cd6cb79b5e73. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH6542066380.
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 0xede8446a7fbc59dd5384f362650e32184ee54b9ae6a5a1726795eb18c79f8d3c. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/CH6542066387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416bd6114f3ee104c7218ed497987dba556d2c1be4abaaf840de824091a8f9b0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH6542053114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4280c778188d14505d30e668b3106befeebe0766dfc119c418ad24e63434d7bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH6542053113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdee9b87fa39de1c377876c101d54245751bb378206b602607dd9a3e3e902aff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542053111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4183d71e69cf4ddb74c0f5a0e4f569c6784e84ff40389103d1f374d23f4a8c48. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6542053098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e36e4af2485f94057af20bccc742cdb5dc02cc248dd3a5e8030ed98761fecd2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6542053097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bb32d96174b804836b2e626a532221b3f5c0f7c10926a7cf1028625b08e3fe. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/CH6542053115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef2f38a7d746a4529f063349fa46e620fceed5e0f205bfc5762f315c12d62f6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:05:57Z), 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/CH6542053100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d2d496838fb8d029074ce0065e424485730022058b23a0873bf4b5de922829. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CH6542053112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c2b9427e966d88ba02ad074eee075d8fe9fbb80380a3d1b4ab4210396a9e0c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CH6542053102.
Speculoos - My Friend (Chapelloise - Scottish)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b72c1d936f8119a391a0eae3f751b1f0fb8739566056553313c6dcf9347aea0. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/CH6542053101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe624373b5995ddb38fb6ffd8b227c68be8e9842793eed170cab294817b933a8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH6542053099.