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 0x3c28ae4b694ccfc9f197982c035352db6b75bb5cb142f7e605c3c5ec89229210. 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/3b6979cc-e4e1-4d02-8eb2-aa7f20014d18.json and https://artists.proofprofile.net/proofs/artist/3b6979cc-e4e1-4d02-8eb2-aa7f20014d18.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 0x7bd68bdbf59b9ef6e0ef8b79ca3fc726e3f855ca30a7ebde4b0e4177a2ca65cb. 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/QZMEV2016971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56a5e749eed2fd42bedca48edb53b348abb18f9603d2da0530a3e0433792e85. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:17:03Z), 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/QZNB82016737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f13ea7202fdd0e2658d46168f9ff893050dcec0f48f75e9ccc86389a672cb9. 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/QZF8N2146352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce36f81d28f6cac6a8511d30c11273460a08c2b990201b4c3eb4be77f4382e55. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZFP52130742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fdda34ca47784007ed11444c4f8a227d17e76582310252479ed47411f4db23. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZFP52130741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a77324497869cf16480cd7cb429fb825997b739f36fc7872865f37de46e089. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZF8N2077954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7a769877c274d6c529fd36b6bcf98c5390a387adb90802cd7f02c34e8ecc7e. 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/QZMWW2159295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a308b0d2262135fd0616faaf2f4d37917e620ecc614953b920e05185a0afc4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:10:31Z), 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/QZMEV2247573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33f2de6cd6fbfd8fa69f0d0ad510f04c62e1860f00cdc883ef1857b0dac31e5. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZNMT2213247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2c5775299d194ae7c916bdf95c4e737551afe032be1b1974f12c5872b7a4f3. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNMZ2256364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1f734e133c90e4f9076a06561d8ebc8de4cb9dd5c5e94e7f6bf01def54303a. 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/QZJG52357226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c764fec217bcdba8b33f615523421f351eb10b7438968cb8e362309dd8a1d0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:42Z), 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/QZJG52357228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f087283093e530ef05a9668416f6f6b97ef9e641767119e56170905a62b1e6. 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/QZJRB2161328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f6fcdba496391ed96b764c8e5a5dcef24c8e334d6c06edc90ff2ca63525d53. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNMT2319865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda22119a9ebf2decc1c7d98875d3feb2197a870cfca57c792ea4c44db6a07ac2. 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/QZFP52307028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9711263faa080f3b04e81af0033f409770dda7d535989cfeb6c1c7269cb6c8. 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/QZNMY2309253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5474bc6b40e6b1a44b2c88f9109ab1f46d9fa4fc7d5d6264f63f27cdfd24b98e. 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/QZNMY2362120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcfb76d2d2d93da7fcb78cdba593442b068751eac7005b2f5d2c6ad35b108b3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZLL92459714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bfcbdd3415a0f1fdd31bc24d9adbfaf4386e70f2c0ae35f98f9d494fcae2c0. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZNMV2440464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52654a353a7c122428f4a7fa7dc6aecab1c5fc6065395c2a1fdb8ed0e9377483. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:16Z), 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/QZL382559176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82207b023f5092f8a171f58ba1567e78ddb00ac2e380d8fd3c5f4d5d8bf6b11. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:56:19Z), 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/QZL382559177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6507bd4e0531b216858fcd19ecec8e5f847199d2d00f031900ae5f956fcac809. 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/QZNMY2555013.