"Mama Kin" is a song by American hard rock band Aerosmith, which appears on their 1973 self-titled debut album. The song was written by lead singer Steven Tyler. It was a staple of Aerosmith concerts
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203e834b5d88843cd1817cfdef23a207396e0827f0fc07d0143a98b5493d7270. 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/e0c56495-1aeb-4576-9861-b2c0b0d5cf7b.json and https://artists.proofprofile.net/proofs/artist/e0c56495-1aeb-4576-9861-b2c0b0d5cf7b.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe8d3bc57303950eca98c9c2a81c2c9558cea8e6157245b81e04fd440db6ee2. 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/AUDC30900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f76b04a3cd94ccab94aed398e8655a18d8891e38ee8c2b4cad3fe62c566474. 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/AUDC30900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c13c9362c6191d5e827ae6630374a0c21a0615886ebac55e7f7e17d64b6dda6. 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/AUDC30900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39af70e837edcabdbc211b32be679232e3390a24144ffb83a089df9564e917a. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCABU1470136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa4e0d8ee2532592279717d67d1ab3e5d33dcf5bcbbf2fcb7c33617f1a4ef74. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCABU1470140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb276f9174831dfb61e4984fdcdb44fee305f8269ecb82f0b2fb3c23a858dce8c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCABU1470142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a2290f6617b3a18d6407b413a341d1911887fe66e4e53b0d24cd191c6d9f41. 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/TCABU1470169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14290f78579c05c37eaed8da734eeaeb45dd2240537087070bb869d6fc08add5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/AUDC31200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82007fdd4561619bbff872e2780c42cefe0cac4a10a4f25f5e566167337497d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/AUDC31200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76910294af1d51156afdaa2b1986c9f154b1b58511576091fc66f4774c9aa16e. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/AUDC31200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e66491221ffa38dada02e6ddbb05fd4b1a9a02ee46e69814cce0c0e007a453e. 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/AUDC31200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa260b5d6049e070ee4326c876dd676c1a1d6bd099f3ee113a6bfb922746cf20. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUDC31200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb467d59837c3e848f155df9b41178df891617e75afaaf134fc2379745ff3949. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/AUAB01700960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5475f051c88caf6bde9f218e92c5a4fe9914cd47da4d613d035c879f8e7efd7b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/AUAB01700961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cef51120efcf51058c06be2c6257451a870aabf56f546b7a6bff3f98ff042e6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUAB01700962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4652cfe03ec8993811a83445b9ab2082e8b79aac489ba61e33fca96f8c3eab64. 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/AUAB01700963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4884bf6458898149ddf6dbaeffa7be773454543a87be28ee6ad16f18921270. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/AUAB01700964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b82975016a8610287851ed2841528352abe862513a1259659dd7e1aad14c8e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUMGB1700389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3720231fd7ddb6ca4b0ef46d6c591fc215dcdf59efd36ddf5390510b6038943e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AUBEC1990300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b009c59b2d6d443de6034f42956198f9517878292aff14fcdcc76c87e2a3ed5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AUMGB2401771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71052cc74a10d394276130359ee2215089161c178cd78dbd032fba7cb2912ac4. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/AUMGB2500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6334f661537d2de350aab8c72e0e497c1b82cf8a2a96d6922b63313d463dfa67. 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/AUMGB2501112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e8ef2f79b0aa895976b0956fa12113b5d0c43b76c011db34ae430d64575217. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/AUMGB2501113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ccbade57fdcbd2dc684d58e0a3b98c41e55025f3161d004be33f5a9882f24d. 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/AUMGB2500389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faa8cf9b80c828eebe695dc2ad1fca25e3760874bbcd2b441fc4e47e35a70d2. 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/AUMGB2501114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18798ec7f16d41e45cf4674d1c94fc7949022d20b4d40fd6ed60055c23bd2268. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/AUMGB2501115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65aec48307bc424c08eabe6975bd92fb86d3fc9ed09d7db60ab7d6022d74265b. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/AUMGB2501117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c942b783c944393ce95c54ad8a8940b71a96aac8bc5d9bcb69d43db71adf82a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUMGB2501118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a773cb026fdefe96ed6b4f3f1f874f8ab5f70c229cc9fda1056406347e8c2f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/AUMGB2501119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c417c902c3b06abcd23faeb529d380b27583809379db486528d72fc784f8f46. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/AUMGB2501120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecbd8c4113a50bc84abe263fcc5d1564b71f0f53a4968ac36c2217e9faf8c87. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUFC01100023.