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 0x22e9c85dfa64dd89af0f612b030986a83c942a54455395354245bc082daade6c. 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/e877937e-2fe7-457a-93bd-6d584a0f356d.json and https://artists.proofprofile.net/proofs/artist/e877937e-2fe7-457a-93bd-6d584a0f356d.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 0xe99ca7d421f6d9a4492b20eaa02d3157036c3472be221dc3b9e404e1e46a4f6c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5Q51808152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4a9bfc2d9102f7c7ef66e6360a775883303cb510464f164bd31573870f7cc7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE5Q51821253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638985efb2f9c5538a6e317e5f573132330d233af1b989ce54f204aef7b2b9fd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:35:15Z), 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/SE5Q51814947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b5d6cd05acc01af402bf8b066cdc79bda11976000a96429cd55eebef30a499. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/SE5Q51826875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bf8cb36aecdb8d7cbb01ac8271b84a8eebdba1db6148ac481655199825f2b9. 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/SE5Q51814051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f160de793ab0f7602d859af96468da8c7ad116c65aa23fef901a87a28cd9ffb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SE5Q51808738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ecd17007ecc8d88d943df28f432da62819f7b13410ebb173ef0f363208744f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/SE5Q51819412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74eba5b249eb78d90f5ff3251e0e66d60732ad66bdaf194e9db4618e77c96c3. 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/SE5Q51802611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137ade148576cbee8ccf488f98995ce50edd557e52ab7ad7822137eaf6c2f30a. 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/SE5Q51825172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8d401b99ff48ed794d0402af983231ab437f93f004539362fcd1fd061f48eb. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SE5Q51823790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934ac1fc0001071fe5b53bfef3c36f235e146a3b7db79940a7ba83c04c4cfcd0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:45:00Z), 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/SE5Q51812058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26abfd1bfaa0d8f4fdfe8d266bd2cf38f768ce1145b073c1096360d4ecac973. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE5Q51814795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70d6f6f26061002802d5d81975256fe26e5553c0b2107246001bdbbef2c6464. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/SE5Q51826280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33823a3d1f97727cbed9b05c98016d2e47e67b1845beb985aba36b7f601035e. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/SE5Q51807425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f390757c44af92f9e46bac9a03e035807dad1fea1b45260a63b7c12a2fb4423. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/SE5Q51825249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcc95bad710293f276cc7e2f65ce244c4cb58e19eceebe94bebaf546a5f8de0. 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/SE5Q51809673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc129abc0557092d9e002cf050fbf00e8ebfd36b1a8eaa75d2119e21eaa81b0a2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5Q51827037.