Gotas de Rap ("Drops of Rap") were a Colombian rap group from Bogotá. They toured Europe in 1995 and in their songs they rapped in Spanish about the social and political problems in Colombia. Along wi
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 0xa9c5c0a7583a34542bb56b508463704f9fc08df1ae8e11de673f9e5c853d0c67. 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/df88f184-3ba7-48ef-a5a5-2f0d4582ab69.json and https://artists.proofprofile.net/proofs/artist/df88f184-3ba7-48ef-a5a5-2f0d4582ab69.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 0x2730bbe2ce5727269294d4346b350af996ad1f6ac746139041da9ee7da4d764f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG1783728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71f37c5d41fb4705ea12b3ac6a2872fbd71fdf7e51a34dc1845dcde75766396. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1783729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4208e29dc02cfe3a16b5df6e446faa9146bd0fd0b580d05dbb7f142687354a71. 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/US7VG1783732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8fba928bbe0cb14d048ea264ed86a7e975a25d6f808183d9c9de391656c5ab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG1783733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aee093a6cccfc4c0f4d2ccc33cae71462f2044e404484a14056a39fe8803292. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1783734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f9633a921e4ea91733982bef15ec61684ba2740a9387397007e2895bd01473. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1783735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5145d4c3b72ea337089a52461c9b1428f67cab3e23761f085bc4885e2797bb1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US7VG1783736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae49438d05497c3a83ee0bdb6b6d2844d9ae2426f73b3c0a644f232d8d59e57. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG1783737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8b2fe6103c920a7c6030a8f5aa625a0099b22b4a12ebc5cdbc11ba11cb3dc1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1783742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c9dca19a6907e7c0f2ded84dcd55c7324fb04462d9af50e60d44416016e7c1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US7VG1783745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8a528a297935eff82f11e9debe65175ea5794d57a45690c440e8815384f19a. 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/US7VG1783747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8162b589364d72749cd492745761f58d2a349ab94b9817084fb5eee70f745736. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/US7VG1783731.
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 0xcdf6f0a88d95c694db19810db7f9d8aedf4846ff6d3f8af7107e3ad4457a7ae8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US7VG1783727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe253d5d3cd20f2dcc872e9df034934c7b4adeb49b64859530010296bc94d1e1f. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/US7VG1783730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734e17930646a307a3a04233fd8523ea4ea16d1c7a3528444b66cd185a42850b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US7VG1783738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b7248f08636cf65d0c11287b2939eb404af0c8c735b977407e464a39347a4e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/US7VG1783740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2e36019f3a37c65c172b8d0dc26ee5e073e9298bf83efb254cffb6b60bdd06. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/US7VG1783741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10f8c1511cb952fc0de4a35905f070ab24d335e82eb2047551e2cc3c368ba1b. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US7VG1783744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a9ed6e941d7e329eeba4281965eb9e87a7ce47457a0af6b6985277e1b25983. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/US7VG1783746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc239d93ded07868c5625037be06cf4cd7c2c3541542c3f69feac0242ba6e4c5e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/US7VG1783717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dc8c8915e07062bf102451ee7d28ef57199528d68f5c537ba242aa797074ae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG1783718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5951c21f9519e424df09a5f1bccc66d79e353f16ba6cc4b3fcdfd664ad6bbea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US7VG1783720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35900961e74c678104e1d4b2d27ee4bdd3025e82977ff06e6c0f54dcc3eb81ac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US7VG1783721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4c0d0895c2167bf1b4b36f07aaf790d995837dbd30750b0b6043f5b9c87b05. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1783724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03745eba554970a0a0d608b38f3fe0b22aaf09daf054bc53adbfbde6bb889a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1783726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136445f67c3303412e37574ace80e6913b62904e47e05fa6e055a8d572c6c7c3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US7VG1783719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb096f5d3ac6fe2b0780409f004c36e6cbda34f164a1e9640c4c0b658df4d405e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/US7VG1783722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882077771c60e809201a713e9d0fae3d3cdd7ee2d5990d04cea5f1c602daf067. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/US7VG1783723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc241b43b3e428fdee078ce81145ac7c6743da7a9b10f2688f0f303dcc6b2478e. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/US7VG1783725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeddfbf8c08a9a6311c192b4b06237b442bdd667ffd1106d1be5e82503dd1bca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SGW502331070.