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 0x7ef802ac6efae1d0ba78f589d0605b07c1a11ab921828287fe77d2da798be9ce. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c930e5c-337a-4702-8ab3-16c228ad3b68.json and https://artists.proofprofile.net/proofs/artist/2c930e5c-337a-4702-8ab3-16c228ad3b68.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 0x91437c0113c9d68aa67548d4828cef823bd49a5c40d9a4606441ba7bc1c4969f. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/ZAYSE2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2729faac0b56ffdc03815f99243ef4cf5f87b7a76e3010f2d228ac38d24fa234. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZAYSE2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dce9b615dff200d533fd5856b2cedaa1146f8e1fee44528bfd6da5f6444460. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZAYSE2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db1f7d5d544622af64c62d6427c7008407800dca1be20b2c43ec7238fa70a70. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ZAYSE2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecae33a8cd10920e3ce4c97871445bc9e960158b8d1695384ef4935543376319. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ZAYSE2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59beee6b27e7cd32d31d7d318064e0b556d12e06f1e8f4954522ab8c1b2e826f. 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/ZAYSE2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71516645255182d9d48f7fe6655d8f082e5cd6da8464737f3f9f7219b5165fd7. 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/ZAYSE2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da82a3b9ec9fce51b8113db2e48f692d0fac2916ce8080422714438a50968b5. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/ZAYSE2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5598357013e8fb5bb011065db1142633553de573d03861f5d24fb2febd7d7e38. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:53:03Z), 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/ZAYSE2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e129d668db68b0b45f8649c8aa31d24d3d2a61ebb5056c35a802afb938ea25. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZAYSE2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86623d5a25e7f29efc86f05f324e5dbb2a752d603e9df5afab5e2e06772eaa1. 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/ZAYSE2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37912dc10bb324676627a0f85e27cb239878650f7fbf11128c86cc9c3c509d0. 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/ZAYSE1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ce1ba4f26550279cca9fa1281c3c9f48d2ebd9c8391b95924e391ce071dfb6. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:09:15Z), 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/ZAYSE1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aca701a04567330151539d2864a76e96c7fdfb4d989b45a2fab65b73db4bfec. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:32Z), 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/ZAYSE1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f321cb8dc0a3c95ee3e4bc88d729a19d4ee54152f1cf591ac9bbf060b34820d. 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/ZAYSE1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ba3f17a14f0c255fa65f4ab984c2f7a5a0d3e3eb8d8250a063eddbe21938d4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ZAYSE1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782a71e52ba2c128c43e72de2f2b118f8ff18f840b8c1d9b88c2909d584fd582. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ZAYSE1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cbe22c08337cdb5b4a29c8e47231209bfd5442def39b7690f3855229634357. 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/ZAYSE1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb723d021791a7b7df104b10414b2e9a581a634eb196146597be7337242bae9. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:51:36Z), 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/ZAYSE2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdaa557f78cb19bd58e5ffa6b387dd9ab62be635a324604b3d3c73ca215a110. 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/ZAYSE2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1e96763f4b3159161281e7548523255219b03b42f245f98db868bc36c22707. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ZAYSE2400034.