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 0xa939d4e328c41e6c5e4f9c7027684ff62397613b4131e1d9e720865d3cf5bef7. 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/29a0f463-1512-43ab-9857-2846611b8557.json and https://artists.proofprofile.net/proofs/artist/29a0f463-1512-43ab-9857-2846611b8557.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 0xa1bd052da974ccdeafa80f5fd2f99d0143bd9676da17715ae0e79ee1b61d2697. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USJ3V2161783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf0abc62bbab411b120f247077e41c90fb0ed02c2eb90aaa25e16439428735c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USJ3V2161784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe553dee7111f4bbfba3cead98c7f8d509208a054ed38c659d319ca3b4ef08a. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/USJ3V2161788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797b32ba473a9b0106df1753811fcf1864f03f8bd596d0039b2ac2af67b5e75b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USJ3V2161789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d851f8203d5f0e27ba232145ebd79179169bc78413bfe3a10570b15ec1ff16. 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/USJ3V2161790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cfd80e5f71965c8fafe7ece695082c1db8a2885bffcd2db80170683f9dbbb9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USJ3V2161792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe21d30ab53a999eb12cb5639368d2ac5d2c47e3cf59a1a949e1193f0bc62dd7. 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/USJ3V2161793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf99be8f2ac16e4f24c0ef898fa591bdc1f052b078ccab7672b8396360495fbc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USJ3V2161795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0b45adc125dc524d6ef27f8cb4ea288ee16b7dc25867b55176c184d08a45c5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USJ3V2161796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b819c03a7c67d453c5c49a4aecedb592468edd0f6cdda9dc2158ea8520f969. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USJ3V2161798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1a2542ca5bd5a40a18ded7b2547e7517dec3b516961ce0c223bfdd79072122. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:06:50Z), 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/USJ3V2161801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ed6a5ab369e7426a2e9f9d727842e4d23d072ed8be3f4ff1f77ce379843330. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USJ3V2161804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50912038d6c88ac49b4d8e1961ee24e9dc69bd272faf2e2d96004b91cc3b4cbd. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:24:31Z), 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/USJ3V2161805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f532bc03f639dc9393719a37d8de726f7f987d21a9308a819e5643a09902545. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USJ3V2161806.