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 0x1a0100e50aa92a74557d102c8c1bf3d1ae1dc7f4357345ecf3991ef3653c0a64. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ca3797f-d472-4ca2-99b3-d9ad49aac7a7.json and https://artists.proofprofile.net/proofs/artist/1ca3797f-d472-4ca2-99b3-d9ad49aac7a7.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 0x7eb9437de489aa21dbf9a04000c53efb0d843b2d6d2fd0b5d48e4732064d9399. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ8GX1701910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4128f1dbe579bee58da5a662e73c58d56f37bde3d48fe0350ffe8cf1c5197b3a. 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/QZ8GX1701955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c4d7595edea8262b210f9816dbbf9283afd30e135ee9c5ba84d1dbda4b9479. 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/QM24S2011103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cd94cbfc96a5a98b2cbed12cc38352072eb70d8f8d5e9795318e4021ca039e. 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/TCAFF2068157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365af17da535aed316f9511f4ee7e18e006b491e6a7a346a3608ceb44add2fe2. 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/QM6N22099689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1156f8e84421f67d2ffdb1ab4f1c7d151416ad1817f639c3130442318ee63a. 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/QM4TX2056107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520f24538d1e648b0424413b7525ed9236724e60d7f639266c52d56343a62a8f. 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/QM4TX2290161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb9437de489aa21dbf9a04000c53efb0d843b2d6d2fd0b5d48e4732064d9399. 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/QZ8GX1701910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6690b40179b171c43aa50591f0cd775a00b741d1342b14f4d599a3aa0262e0b. 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/QM6MZ2288683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b19ac39d2796297d3d0e552cc3275da346f97288825661d6004848e8ff16a3. 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/QZ8GX1701687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717722463675e29954e29899311307da4786f7f96e6d641f89eabd2a2828f0a5. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZ8GX1701804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa905dd6e595574aa78122fe61c41d0b31256acd7aafad92429a380eda30764. 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/QZ8GX1701727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc086710117787fbdfe0c373b4f980b68258a233b762c1aa11b274639af6da52a. 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/QZ8GX1701986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06262c0659212612084e74296588891a47c6223c73e4d698fcfc91a5d199913. 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/QZ8GX1701987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5aa84f74b656f73c24981c61097395f22bde396ea830213830962752a2f7fe. 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/QZ8GX1701735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b025c02d36ea261e7f28399d6263c4e55d0a1f5e8a70b1a704fa0f9c5b22ab. 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/QZ8GX1701999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ffb2456ed4e6037f680aeb8d1fe46502a2b51478b19a8f931f4a2123d196d3. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:19:08Z), 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/QZ8GX1701985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71e6f025953fd770e00d26b328c5c9e96acb6d79b90d5aeb7a1d691500367ef. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:22:35Z), 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/QZ8GX1701855.