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 0xf193014206d2be1aeae4ae1313ab886d6fe1fca0c8138c59cd4e4606ed58840a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fc9bab2-2ee1-4a6a-a7e0-558a0be61cc7.json and https://artists.proofprofile.net/proofs/artist/9fc9bab2-2ee1-4a6a-a7e0-558a0be61cc7.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 0xf8a1a1b6b0cfb75556e55e9be65dea985e3ce5a7597de15f71246dd39bce0467. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/CH6542390796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d0f06ba7c9bb204d4026318d30b73bf91cf1e2680d2bdbf6f78f123695f6ed. 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/CH6542390802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3164acea9afe7421d5ec8e960519b0ca37ee89b0ca55bd82e11a80ea5428a20f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6542390805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ebf355af246528a3c7a1a90f4088441abc5445e250627b539b7e9df36cc232. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH6542390797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b275810256e54b4e3c4f0cf93df5cf989fbc0f175cbe4f7bf67ebbb3954d74. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH6542390795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0cb9db6844bfef5ec3adcdf7876055b643b722f3c3fc87b7376a13bcb83477. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/CH6542390794.
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 0x10bcad7f2927ccf00c86f3c56898eed92c68bd6f9298e4c2b1291b43757410ab. 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/CH6542390793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa35c251d7c41ea65a815b38f3bc185c25a6a59e21360df0f1c4027fecf11c5. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/CH6542390798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6889222f8ca95b7367349f6116b290577bb24069e0e55655f3d75004c6bcce90. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CH6542390806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5db32d5c42213ba629320b1fbfce5bbf677c58ea485ae7932baa2e87c85f66a. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/CH6542390800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da0faf8a262ee5f646c2a5e72bd0b1eeb12552ef2d404c795b4c7c491afbae4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CH6542390801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02c4956c4895192bae74c3ea826716f55c8e37e094ffa6adb61468c9f67c742. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CH6542390803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fb161c33d4cc6e6e11741241a4450d26280460da466bbb4212795035c1f121. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CH6542390804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63631e62b646826787d59198d881bfe881084a02488eaa792dd64d9beb31106e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CH6542390799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a4d7d3bdf703574fd057d0e52915567e6eaf24dfe6f3b3eb875592780d3fa8. 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/CH6542392241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44701b147b0d4af202d84b68835715d0ece1ad011a23f78f58cd33f4cc00f5d9. 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/CH6542392242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701d905a376d29c7cd328435cc0a0eefaaa41c7af76f09050008fc779f230322. 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/CH6542392243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc259d3295721e12f0fd4ee5f9d492c35ef5cccbe270c224d755b85e5ee23da4a. 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/CH6542392244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a49a50db79cb60481f38e8031dec49d3bb916623fba9eb2195b05a6c66a762. 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/CH6542392247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339ad59c00730d111bfa2bd18de65facab39cd68efcd2b0bf45d4cde947a5b2f. 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/CH6542392250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666efd3ef76bb7301981c07d7993f3f128ea99cb693fa51a29c24810b2c67d33. 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/CH6542392251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720a7ade16b79bc87d6d6b0c15edb22fb4507fa35d5de0872377be6767f98b21. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CH6542392245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d36e63d2e27dea137b52e40d8123503dae9ca393cad379dfb5befd2aa4be89. 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/CH6542392246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41bb7b2a73c5923f0e005a88ccdb6b4a089f447c454e5ff4ab0aa2c6f2baeb7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CH6542392248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31611880ed61419bda98491d25f54221d70b877cadf1bc91f8e7df34df5e820d. 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/CH6542392249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd380546a60a29001e840297c729e4c2a323b162aeb4e1dabe49a97db2fab9375. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GX8LD2448535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa996e75679306fb0f94d69135bb87fa860ac4bcd597c5ed7466c1f5cdc8c1e1a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GX8LD2489313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda3080923b23cc7032ce78ab03cfbb32acdd990fe89e279918bed1676dd5eab. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GX8LD2411834.