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 0xdf9361fc1fa1bc404c297c391b60e95feecc170d5b6d673ea4936749528f1f86. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d52d0249-93ab-42ae-a5fb-27f06b9ed46f.json and https://artists.proofprofile.net/proofs/artist/d52d0249-93ab-42ae-a5fb-27f06b9ed46f.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 0x2a5f22f5680a73cdf5c4ea0ff723e2b9c53ea84b16356cdc43b905dbcf021aa1. 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/QZK6Q1948128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e5893e17ef259b66804fb73518ee30b7fc3f5571ab031b6f4a924fcfe4dff5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6L2289940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07af6f13b886b05392d392f7aa82858604b97f89266db8ec8161550ce8a1507d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:07:52Z), 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/QZK6J2356231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789fba488719b00a9c510ca80d34c732bb210d2e7f6ea22edb45885448fd4607. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:08:40Z), 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/QZK6J2359157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faca986940e9b6e05f643fa4b1131adc2adc49ac0a0225ee8d82bbb60d49517. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZWFF2309685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abe96786c87fb7211c1e6cb7d12856a2399dc6ba087a9ff69c62d0f504fbc9e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFJ2389712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9b210e5a596a4ea28596c6ad7c0a697cf2e6df484b6d4948df38b408add267. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA52400821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8251e74385a8a0edf6d3980a2928976f1d318c319aaa7df7b14042a5d2513f5. 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/QZES82439148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa779da553cf05badb353a2dbc665691d5254b9a42de68f7a1e4261aac5ff4d2c. 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/QZES82442777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c825d3e1345ea9c5ed8207b70941e2b299d5dceeac3b5d726572a94eb10a86. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6P2446756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e33ef3a8c331505de35a7bfc28a3b52e925d24aa1360a019c83cccfb5281ee. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWT2416669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816b0769d55f88b09ba5e75aa66e22149ff6eae9b14e66cf572123c3fe450cc3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZRP52433895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2297ab0e485997227eef6383d91b0e9591b8f8e85738f0334d8f8ab3b6ba3eaa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:08:58Z), 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/QZTAZ2436248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb4b9d05b7a6bb34125a725e54a53ee8e1f9dc755484d14d8ed3621aea96b80. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZTBB2479199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd094ba63cd01e5bdc549a3279b2c0d934b3d36763c33857a64fd412a0246b95b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:01Z), 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/QZWFF2463975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c00f40c05082aeac331662b22932e6f9cb2b374aecfb997656df7fe14e3393. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFL2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18982d93df9312dff6128c7856e7d6f0906c6777ae8127f35317a2c0bcb94e2. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/QZFZ42572499.