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 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 0xfdc7d65a6979569a49fe8cf2cf4b7cd0c9825c264b8336ea7f1fc09645c43b92. 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/d01df777-3f39-4855-9742-2995382a21b4.json and https://artists.proofprofile.net/proofs/artist/d01df777-3f39-4855-9742-2995382a21b4.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 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 0x181741ed5908451ae52351f693c3653f8797659da56ff1fb3883dd7e263eded3. 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/ES94G1400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082880564605cf3404360e433ce2ba68c4a39a065b2e270a870827755a1b4e92. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES94G1400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85214ec1c7dc3c16cca453bc917adeaf0771b68fc2e893b68766644c73217012. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES94G1400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e148d991c7704183fd98e807ec7e6102f575694eb05d57c19697f9a0b89ceb. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ES94G1400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d20a6a0de3d5a63f6c0615e5bb2a3862fc0b0f261e5def665ac34999e51a2c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ES94G1400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc270fb4c3c96e4e08a54fb085a4eeffad0ab94b138c6b87ed57db71ed24e71a4. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ES94G1400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58629168c1c8e13bf5b5005afed76306455a5628017d72ef0ba69bb7061c325a. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ES94G1400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a71a247ac30ce85bb2feaf7b9f1de6a8fd62a63afdab3693f25827972958908. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ES94G1400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53a14ccfbcb6fb8370e81303daca215c646af976bdd49a08419bbb361cf145e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES94G1400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3ad6f9f169ee63f9e9163b6c4625e9e1325ac1e33210a8e3c87f3ca0494690. 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/ES5151502506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dc9ee46933cdc96762bc867b4fdd2be2dc4d65c8dde21c482e530f3fd7eea8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES94J1800202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc62df236f7c7d87fb3446844e029db8e327a22a6797f7ff679c934449a8b015. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES94J1800203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb62f0f4940ad3377ace5d92a89be5afc5389db96350aa3423939cb69310dccb. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/ES94J1800205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af49445d2baade037286ebcc35720ce9d705b8b9d4db04c93762a01e0b9cfa3. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/ES94J1800206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53e2bde4f8cafc53b23d76b8064d0b4f5301cfda1fe7568d3b665143e573692. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ES94J1800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5def86a349e045cb0780e2af060a13cce88726f71d0a4af9e9eaed9bd21e065c. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/ES94J1800209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f86762f8dc425d9b3c6fa50dbd4ef771e18fea76d0b6358f19c7bb659ba2367. 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/ES94G1900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cedf9c18ffa9532fe5dfc4bf48adfb13a6c9a926ec5c817e8e25143a9d01431. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/ES71G2036262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a25225d4ca61087ad2b3f6e95c689a37557a5afacc724b5b1da60fdb7309c1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ES71G2109720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15321a6f042af5085fe96a751bb1965dac118ae477f12176065742fedbe6a8ec. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/ES71G2142945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc926576152eff8b62ada76bdd58bbd3199567f109ca9100486618db9e9950501. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-02T22:12:38Z), 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/ES71G2317659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e08f8c2a79ebbcc8389f9db0e306cdad49dda4c00d935c5496b08d6c233ee7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES71G2337487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbc1c05a5c7effff0764104ddccd90b185b9ed6e5cdd325798b6e5172654b96. 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/ES71G2337488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc926576152eff8b62ada76bdd58bbd3199567f109ca9100486618db9e9950501. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/ES71G2317659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ac817cf18a5a1d8d6dd3e47c717230dd2cc4e69ccff99ddc8d00639df056ee. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES71G2337490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb075fa50bd95c68b0fd350b1bc66fa111c74570f320af58d51850db49531f995. 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/ES5701901015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643439d02826c9246cab207f0cc48e44d1344f77a4ba462b87382d4ab4a83972. 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/ES39I1400015.