Marc Spitz (October 2, 1969 – February 4, 2017) was an American music journalist, writer and playwright. Spitz's writings on rock and roll and popular culture appeared in Spin (where he was a Senior W
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 0x29ebe9b3caf09d6b0a6a6273fda86d74268fcb674f1dc6b8826ae0e09f4afb94. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/739d8ed7-ca80-4f89-a207-f4cbe81891b5.json and https://artists.proofprofile.net/proofs/artist/739d8ed7-ca80-4f89-a207-f4cbe81891b5.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 0xa405564488c64a21e19d149cec9c89c6c91fffa83dadbbb6466c9960d0476d9b. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QMEU31301060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb878d82afa429640f93e22f1681466c6459f5dd065c11a4bc66d328fc493429e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMEU31301062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a7a8c649eff0df10c3e7af23055054cdb7e763b88d7f413598cb94344bbffd. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:00:21Z), 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/QMEU31301063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4fa85d6597226c4a9a3954dc56155bf41048aa051842d93d29e00445c71692. 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/QMEU31301064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9533e0e3bce2abe5157482580c87f35437302976469c53c522055636ac73e5b. 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/QMEU31301065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57e881460360e67a9975ed5ccd7d77a3b392276569770082ba29b855fdebeff. 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/QMEU31301066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358f293791124c11aea765d8907020705853e701927749d1583f5cb27d04bd8a. 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/TCADS1852774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71768cd5f95c2496f94ae05831ab4b2aa711e755d962ec231dbf2c3e59e1dc2. 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/TCADS1852775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986dc922053a91c133d7f0f8828e3907243a5a61a2898461c393220f13f76196. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/TCADS1852778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0352c2ab80a76562d3bc2d47ecfe3d9745adee1e79e999438a672fc36f3d0c93. 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/TCADS1852780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f219cfad9aede24c9f84603f333039bda19bec133010b2c332ae9be5fcfeb5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCADS1852787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21cb3fbb46ecdbb1e9fafc214f54c6bdb0adbfd6d0ed7c1e3372de3326c29e4. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCADS1852794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd53cee0dd68447a7117db52b6a24cf3b6e8ff4ffb8bed8d7be1b1efd05b83e5. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAEU2088468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc75c9b2012b086b2bbb0a3438cbb81c4356b8c714204255ac8b4461303a6acc. 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/TCAEU2088491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6631864a8ddb6c37d8e9dbaf38f1bf009a29bdccdc377b52777584f606da739. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAEU2088513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc62304efd96b3cbf700ccf580b9749c7c4471b76f3d7cebd6169ac8a819098. 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/TCAEU2088535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef17f4cca21c42a19ac268f20a6bb4c89fa4dbe565fb9096b1f10dba155d1a2d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAT2325691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602a85eb8c80ae4c440b4c24e4d440f7ea252262c68bb35b5653e2e21fb0bae2. 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/QZTAT2325693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101b4a03ca29209d85b39c7c832880e41b3ecab331c38d64bd8815b4ad625415. 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/TCAGG2282665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9451e86f084ba5c2445353edf483378459c6897ab823cdcd250155a3edd643. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAGG2282679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ea1c084893153f32715aa2af36d1fcbbe0a8f4235cf37774f67b7f78ee3f2b. 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/TCAGG2282686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e0cc516ccf59dc5f68475f0bd4c94fb65568b17187e950f42e24238a1989bd. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCAGG2282689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0e22a5e6bd6a28656317901723ee606aaddfa8af2828cb46ea4f8e99d73c98. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:01:06Z), 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/TCAGG2282692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ba51813e48c221c6b936ab7960f3e7a5bb7ffb5dcde02f6fe4e36c1e5d92ce. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAGG2282703.