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 0x4d2f253f7fc977ca6c4b92f6aafeb72f2101faf6006034386e47ad652c9f24e0. 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/020372e6-f62e-436b-aea0-1d8b65c87d08.json and https://artists.proofprofile.net/proofs/artist/020372e6-f62e-436b-aea0-1d8b65c87d08.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 0x3c47f638121bef616c7acb8b75e7303fd8047276a3cb08ae9bad42c8bb2b0a54. 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/FRX282397438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fcf01f665ddb69767c007c8454f05cf26b486655612eef99252d57a80b608d. 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/FRX282397439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf431c5000b9bf7efadc16bdf87761c8be61ef64248dd920674c3ab5fa2d170. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRX282397437.
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 0x6648aea81cdd459437069d90b4118aa78fd32141292d9939ca7953fc884f3850. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRX282397440.
Chronicles - The Complete Prestige Recordings 1951-1956
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e8c3a693ee303c4fef00ba3066814a49170369b6c2e5ba188db5c3fbf56303. 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/USFI85300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3ddbd743c5a468ed27f8257f84f6d393a115a40246d3b0d1da13150f4c36cd. 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/USFI85400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7e782aa18762e442d08f954322ff6e2b7aeb187f95fea2008c24ec48ebc726. 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/USFI85400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379340e0e073cf7c6239758ebae0b90984234d3312b2a422963d5498f8741ea9. 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/USFI85400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac580dd69bcd8580a33f4e748a13994666ea5cdee9dfd700918dabbcbbfb5bd5. 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/USBN29800333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6b52fdb61b0d7e4eca5a894c60b6a3a2e662a5e2f712b1e5ddfac34b705302. 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/USBN29800341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d54073aaa4bc6ba800fc277ee5fc1433cbc2d5d7d9c8212cddc1b3fc4bd0510. 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/USBN29800343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8438e6361976fa49002e45125613950187e13121bbf7b8a560046c4c293e100. 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/FRX762392440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd947758201200988e2081c46a4ee60122dac7c2206f3f88b37edc72d50ab3046. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USFI85300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267ef0f5fcdffdb23a9b72839a19c24f875e9077df879f120e9ac724e3cb7438. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USFI85300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7b92b21fac1d585afcbc6075b6804719bb73bda7859633f2bbe69796eb1112. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USBN29800340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c6451c4b18f9cf43c4ccfcca52992bff326d2375fa126d370dc7d4dcd1dc99. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USBN29800339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed8463e8a51bef64e5aecba79cdfa67c7aa879ae34997921ffbb7d1e571b3dd. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USBN29800334.