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 0xb6eb885d5fb01ffd2bcd755246473f7b8e4d9c6f585c5e879be351438ed3abef. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b963791-faca-48ec-970b-45b5a0d9d854.json and https://artists.proofprofile.net/proofs/artist/1b963791-faca-48ec-970b-45b5a0d9d854.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 0x30c7dec0df1e7d8ebff7753e4b054a96ef0c9398bdfddf1e4e73ac3935ea517a. 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/USUYG1018099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc380b7c2e7cc92064fc4c09cbfe562326f9f0c6fe7acd591cbd07bded4af99f. 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/USUYG1018113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df59861c81dcd1bd970410e4cb197f13778dcf347a79a6289c74abfa9cf26e5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USUYG1018100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062460a95e91af3e7f6c0c4953fa17f072a3c6786ccad936520d769a47eeaac0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USUYG1018101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7311c6e595baaca5c1148bbcca584b8828b1020fb8ed3dc171d063d78fba5dad. 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/USUYG1018115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac06520a7043e563f2ec634182392771a6b6cc0f31a9bc1efa4e1d0ed8ede975. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USUYG1018102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025fa34e4a29d7b1d940e747c7a50d43bf99ed84a5821a0761bfcc62880c1b39. 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/USUYG1018116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8422466afe990bfa33b1b42b9642e7ef9a3f0c74ede7d84ec92316b921b0070. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USUYG1018103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94523bd36217e641ccf8c3f27cc4badfbeca4be18f7981d21f9b8edf537304e. 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/USUYG1018104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b40e741e4440fff694d8991ca0c99641bcbb122d3e00b390518c07292339c0. 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/USUYG1018119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd865e9b212d79389981db0fb589451d1d3c05afb244070a396d1bfdef72008. 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/USUYG1018120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a15eeba3f2ad0de9482d65827eddfb55f20a4c8f6f14285149e657a3cd88560. 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/USUYG1018107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deee410f763ef77629eecd2cf15a786d7e07d82922b40a57c4cf19d3a79e5a7. 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/USUYG1018121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fb1de217af034eb5a0d00a8afa3f76993d8df959c9697144758494e962fb34. 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/USUYG1018110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa599747d637298780010791d82ea8d3cd95ab0be88433f47be447e4cf31b13fd. 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/USUYG1018123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2398ca2eb3c99b8d9aca391847dd4c7954a40efc352bd487e372cc3b269b2b. 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/USUYG1018124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da9b883b50e6b68c467a3bc79b8ac3279507248bc6cfe8eb1d7797b84652f18. 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/USUYG1018125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcb553d94a9e75648531d3676195442f9956219e4d0aebdb1aa1416afa860f9. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USUYG1018098.
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 0x7e19a938e82ebdfe54f94b2e0f48b0080762c27b3145de7990a44818aa93757a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USUYG1018112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae92f1812f18335625eb6ffc22e55dca76650f72792126e33f6f112a38a58f6. 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/USUYG1018114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f2c1204d7b73f4e49b2abb261c9cb2282cab60f33179b1013a22ff93c283f6. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USUYG1018117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fa608b993499f067949a0df67ed5f32b4db37678c5330f3ad77fe344e4c38c. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USUYG1018118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6ae21193e35b375a3587567d484ea2b866d7a7b00b5a90b66bd9d8cb45964b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USUYG1018105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cff55331728270169a3a4f95403046415eb366f539332c573b274896b5ec6b. 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/USUYG1018106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe79514bd53aff21205dad6ebc20d1eae263ce86e42fdaa98ba9185d8ab4f698. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USUYG1018108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818a9a7afc0df417397368733ddd885516666877dff3882717f17513ca2b1678. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USUYG1018122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f04fff5df401581e32c909039d61033510f0334fa0a0ab5dcdeb4e3904000b. 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/USUYG1018109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe238ea5d65b1d5bec25f973457d0c775f3bc4648b6f94704895f6053b2faea0e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USUYG1018111.